Wirestrike involving a Cessna A188/A1, VH-KQB, 9 km east of Mindarie, South Australia, on 31 May 1997

Summary

The aircraft was being used to spread dressing on a property near Mindarie in South Australia. The landowner had not provided a map of the treatment area, instead, giving the pilot a preflight briefing that included drawing a diagram of the property with his heel on the ground. The property was located just to the north of a heavily wooded road running east to west. The property owner included the location of known powerlines in his briefing to the pilot.

The pilot began the job by performing the clean-up runs, filling in areas not suitable for the longer swath runs. He flew these runs primarily from the north-east. As he set up for the first swath run by flying east along the road before turning north to the property, the aircraft struck a powerline. The powerline was strung across the road to a derelict building.

The pilot reported that the powerline separated from a point near the disused building, and that approximately 30 m of line snapped back across the aircraft, damaging the left wing and aileron. The pilot landed the aircraft safely in an adjacent field. The pilot reported that the owner had not advised him of the location of the powerline because the owner was not aware of its existence. He also reported that he did not consider the likelihood of a powerline in that location due to the rundown nature of the building to which it was connected.

Occurrence summary

Investigation number 199702167
Occurrence date 31/05/1997
Location 9 km east of Mindarie
State South Australia
Report release date 07/08/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Wirestrike
Occurrence class Accident

Aircraft details

Manufacturer Cessna Aircraft Company
Model A188/A1
Registration VH-KQB
Sector Piston
Operation type Aerial Work
Departure point Mindarie SA
Destination Mindarie SA
Damage Substantial

Forced/precautionary landing involving a Saab SF-340B, VH-CMH, Sydney, New South Wales, on 27 June 1997

Summary

The SAAB 340 departed normally from runway 16R, but shortly after becoming airborne the crew requested a return to land. When asked if operations were normal the crew reported the aircraft had suffered an engine failure. ATC activated the crash alarm and closed the airport. The crew were offered a circuit to either runway 07 or 34L/R but elected to continue for a right circuit to runway 16R.

The aircraft was flown on a visual low-level circuit to a safe landing. Preliminary investigation revealed major damage to the power turbine section of the left engine. The engine was subsequently returned to the manufacturer's engine overhaul facility for examination. Their engineering report revealed that the stage two turbine forward cooling plate had separated at the outer rim.

The report noted that the failure was consistent with other cooling plate separation events. The manufacturer had previously issued a service bulletin which introduces improvements to the cooling plate to preclude this type of failure. The operator had a program to incorporate this modification during planned hot section module changes. Incorporation of the modification to the failed engine was planned for the week following the incident.

Occurrence summary

Investigation number 199702089
Occurrence date 27/06/1997
Location Sydney
State New South Wales
Report release date 25/09/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Forced/precautionary landing
Occurrence class Incident

Aircraft details

Manufacturer Saab Aircraft Co.
Model SF-340B
Registration VH-CMH
Sector Turboprop
Operation type Air Transport Low Capacity
Departure point Sydney NSW
Destination Wagga Wagga NSW
Damage Minor

Hard landing involving a Cessna 210L, VH-MHC, Bankstown Aerodrome, New South Wales, on 25 June 1997

Summary

The flight was the first exercise for a type endorsement. After some upper air work had been completed in the training area the aircraft returned to Bankstown for circuits and landings.

The instructor reported that the student was having difficulty with flaring the aircraft and was occasionally ballooning the landing. It was therefore decided to terminate the exercise after the next landing. The final approach was normal, but the aircraft again ballooned. Before the instructor could effect recovery action, the aircraft stalled and contacted the runway heavily, collapsing the nose landing gear. Both occupants vacated the aircraft without injury.

Occurrence summary

Investigation number 199702068
Occurrence date 25/06/1997
Location Bankstown Aerodrome
State New South Wales
Report release date 30/07/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Hard landing
Occurrence class Accident

Aircraft details

Manufacturer Cessna Aircraft Company
Model 210L
Registration VH-MHC
Sector Piston
Operation type Flying Training
Departure point Bankstown NSW
Destination Bankstown NSW
Damage Substantial

Airframe event involving a Cessna 185A, VH-AGF, Darwin Aerodrome, Northern Territory, on 24 June 1997

Summary

The aircraft was being landed on runway 36, with an easterly wind gusting to 10 kts. A three point attitude was used for the landing. After the touchdown, braking was used to slow the aircraft but it developed a swing to the right. The pilot applied left brake to stop the swing but pedal pressure was soon lost. The ground loop continued, resulting in damage to the left main gear and left wing.

An inspection of the left brake system found that the pedal bled to the floor, after initial pressure was obtained, in about one second. No leaks were found. The fault appears to be an internal failure of the master cylinder.

An emergency locator transmitter was carried but it did not activate.

Occurrence summary

Investigation number 199702065
Occurrence date 24/06/1997
Location Darwin Aerodrome
State Northern Territory
Report release date 05/08/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Occurrence class Accident

Aircraft details

Manufacturer Cessna Aircraft Company
Model 185A
Registration VH-AGF
Sector Piston
Departure point Timber Creek NT
Destination Darwin NT
Damage Substantial

Forced/precautionary landing involving a Bell 47G-3B1, VH-HGM, Leeton, New South Wales, on 8 January 1997

Summary

The helicopter was spraying a melon crop when the main rotor came into contact with a steel rod in the crop. The subsequent rotor imbalance necessitated a forced landing. The helicopter subsequently landed heavily, and the main rotor blades cut off the tail boom resulting in substantial damage. This accident was not reported.

Occurrence summary

Investigation number 199702020
Occurrence date 08/01/1997
Location Leeton
State New South Wales
Report release date 12/09/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Forced/precautionary landing
Occurrence class Accident

Aircraft details

Manufacturer Bell Helicopter Co
Model 47G-3B1
Registration VH-HGM
Sector Helicopter
Operation type Aerial Work
Damage Substantial

Collision on ground involving a Cessna 182, VH-CDJ, Bunyan (ALA), New South Wales, on 14 June 1997

Summary

The pilot reported, that during the take-off run on runway 27 at Bunyan, the tug and glider combination experienced a slight down draught which caused them to settle back on the runway. The combination ran along the runway for a further 10 metres and the glider became airborne again. A short distance later as the tug was becoming airborne, there was a hard loud thump on the nose gear. The aircraft became airborne, and all controls and instruments indicated that the tow was normal. Given the length of strip remaining, the hill in front, and the glider at low level on tow and the now normal operation of the aircraft, it was decided to continue with the glider tow.

The glider was towed up to 5,500 ft, and then released. The tug commenced a descent and returned to the airstrip to land. After allowing sufficient distance for the tow rope to clear the power lines on approach to the airstrip, the aircraft descended to make a smooth touch down on the main landing gear.

When the nose landing gear touched the ground, it began to skid over the rough surface, as the scissor link had apparently been fractured during take-off and the nose leg turned through approximately 60 degrees from its normal tracking position. The nose leg then fully collapsed resulting in the propeller striking the ground. The aircraft subsequently ground looped and the left wing tip struck the ground. The aircraft was evacuated with nil injuries to the occupants. The pilot of the glider observed that as the tug was about to become airborne, he saw a cloud of dust rise from the nose wheel of the aircraft, after which he noticed that the front wheel of the tug was approximately 60 degrees from its normal position and the scissor link appeared to be fractured. He advised that he continually tried to transmit a message to the tug, but his radio apparently was not transmitting.

Occurrence summary

Investigation number 199702013
Occurrence date 14/06/1997
Location Bunyan (ALA)
State New South Wales
Report release date 09/10/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Occurrence class Accident

Aircraft details

Manufacturer Cessna Aircraft Company
Model 182
Registration VH-CDJ
Sector Piston
Departure point Bunyan NSW
Destination Bunyan NSW
Damage Substantial

Runway excursion involving a Cessna 172C, VH-CBW, 9 km north of Muradup, Western Australia, on 6 June 1997

Summary

After departing Albany for a private strip near Muradup, the pilot encountered deteriorating weather conditions including showers, cloud and failing light. With rain falling at the alternative strips, the pilot decided to continue to the private strip. During landing, the pilot rounded the aircraft out too high. It floated and the pilot applied full flap resulting in a landing 200 m down the 600 m strip. On the application of brakes, the aircraft skidded on wet grass on the slight downslope. As the aircraft came to the end of the strip, the pilot reported that the aircraft veered right, puncturing the right landing gear tyre on a log. It continued along a dam embankment before hitting a fence and coming to a stop. The pilot and passenger were not injured although the aircraft received damage to the right wing, left engine cowl and left elevator.

Occurrence summary

Investigation number 199701892
Occurrence date 06/06/1997
Location 9 km north of Muradup
State Western Australia
Report release date 25/06/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Runway excursion
Occurrence class Accident

Aircraft details

Manufacturer Cessna Aircraft Company
Model 172C
Registration VH-CBW
Sector Piston
Operation type Private
Departure point Albany WA
Destination Kojonup WA
Damage Substantial

Loss of control involving a Robinson R22 Beta, VH-POR, Stoney Creek, Queensland, on 13 June 1997

Summary

The pilot reported that he departed Mareeba in company with another R22 helicopter at approximately 1645 EST. The flight was intended to proceed from Mareeba to Cairns via Stoney Creek. The pilot stated that approaching Stoney Creek (5NM west of Cairns aerodrome) they landed to assess the weather further. After consultation with Cairns approach they were advised that Stoney Creek was visible from the control tower. Both helicopters then took off to continue to Cairns. The pilot said that shortly afterwards, and before reaching Stoney Creek the weather ahead deteriorated suddenly, and the pilot decided that they would return to Mareeba. A turn to the right was commenced, and shortly afterwards the helicopter began to yaw uncontrollably to the right and descended into trees. The passenger was uninjured and was able assist the pilot from the aircraft. The pilot then used his mobile phone to call for assistance and guide the Queensland Emergency Services rescue helicopter to the crash site. The passenger and pilot were winched from the site and flown to the Cairns Base Hospital.

Subsequent examination of the helicopter revealed no technical defect which may have contributed to the accident. The pilot described the control loss as an uncommanded yaw to the right, indicating loss of tail rotor authority. The pilot said the last time he observed the indicated airspeed it was 40 knots and was unable to explain the uncontrolled yaw right. Although there was no discernible horizon at the time, the pilot said he was flying towards a clear area, was visual with the ground, and was clearly visible from the other helicopter which was slightly higher and to his right.

Occurrence summary

Investigation number 199701916
Occurrence date 13/06/1997
Location Stoney Creek
State Queensland
Report release date 24/07/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Loss of control
Occurrence class Accident
Highest injury level Serious

Aircraft details

Manufacturer Robinson Helicopter Co
Model R22 Beta
Registration VH-POR
Sector Helicopter
Operation type General Aviation
Departure point Mareeba QLD
Destination Cairns QLD
Damage Substantial

Collision with terrain involving a Bell 206B (III), VH-HRE, 26 km north-east of Jabiru (ALA), Northern Territory, on 13 June 1997

Summary

The helicopter was being flown in support of geological drilling operations and had just been used to externally sling-load a pump into a creek bed. The refuelling point and landing area were located about 20 m from the edge of a ravine which was approximately 30 m deep and 100 m wide. A tree was growing from a point below the top of the ravine and the tree's tops protruded approximately 3 m above the ravine's edge. When the pilot flew the helicopter to the landing area to refuel, he lowered the external sling to the ground and then flew the helicopter backwards approximately 1 m, intending to land next to the fuel drums.

As the pilot was landing the helicopter, evidence indicates that the left skid became caught on a rock. When the pilot attempted to fly the helicopter clear, the left skid suddenly broke clear of the rock. The helicopter rolled right as it climbed, and the right skid impacted a pump housing protruding from the top of a fuel drum before striking the top of the tree located on the ravine's edge.

The helicopter continued drifting and began yawing right as it descended into the ravine. The pilot reported that just as he was regaining some control of the helicopter, it landed, upright, on a rock shelf approximately 2 m from the ravine floor. It appears that at this stage, the main rotor impacted the helicopter's tail boom. The helicopter then rolled and fell off the rock shelf to the ravine floor. It came to rest on its right side with the engine still running and main rotor turning.

The pilot reported that he then closed the throttle, turned the fuel switch off and exited the helicopter through the front windscreen, having suffered minor injuries. He also reported that he turned off the emergency locator transmitter beacon although it did not appear to be operating.

During the landing, evidence indicates that the left skid became stuck in the rock. When the pilot attempted to reject the landing, it is likely that he would have used a combination of up collective and right cyclic as the helicopter pivoted around the left skid. It appears that the rock then broke. The sudden release of the left skid, associated with the cyclic and collective control positions probably caused the helicopter to rapidly roll and drift right. As the helicopter climbed, rolled and drifted, it was likely that the pilot could not have quickly regained control due to the subsequent impacts with the fuel pump and tree. It was probably fortunate that the helicopter entered the ravine, giving the pilot time to recover some control before the landing on the rock ledge. The forces and imbalance generated by the main rotor strike on the tail may have then caused the helicopter to rollover, fall off the shelf before finally coming to rest on the ravine floor.

Occurrence summary

Investigation number 199701920
Occurrence date 13/06/1997
Location 26 km north-east of Jabiru (ALA)
State Northern Territory
Report release date 07/08/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Collision with terrain
Occurrence class Accident
Highest injury level Minor

Aircraft details

Manufacturer Bell Helicopter Co
Model 206B (III)
Registration VH-HRE
Sector Helicopter
Operation type Charter
Damage Substantial

Collision with terrain involving a Cessna 177, VH-DZC, French Island (ALA), Victoria, on 3 June 1997

Summary

The pilot was conducting a charter flight from Moorabbin to French Island and return. He was carrying 3 passengers with light luggage. On arrival at French Island, he landed to the east on the grass strip. While taxying after landing the nose wheel became bogged in sandy soil near the eastern end of the airstrip. The pilot shut down the engine and the passengers helped him push the aircraft to a parking position facing west at the eastern end of the strip. This location enabled the pilot to use the full length of the grass strip for a take-off to the west later in the day. Later, when the group returned to depart the outside air temperature was approximately 14 degrees Celsius, the wind was calm and the QNH was approximately 1021 mb.

The airstrip surface was slashed grass and much of the soil underlying the grass surface was sandy loam. In the take-off direction the strip was slightly up hill until about midway, and then slightly downhill. The airfield was approximately 131 ft above sea level and the surrounding terrain was gently undulating. The pilot applied full power and held the aircraft on the brakes before commencing the take-off roll. The passengers reported that the aircraft accelerated normally for about 100 metres, after which the rate of acceleration slowed. As the aircraft neared the western end of the strip and the pilot rotated the aircraft to become airborne the passengers advised that they heard a noise which they believed was caused by the tail of the aircraft striking the ground. The pilot did not recall a noise as the aircraft rotated but said that he noticed a slight change in engine note soon after liftoff.

The aircraft climbed to about 20 ft, banked slightly left and then settled back onto the ground approximately 70 m from the point of lift-off. It skidded down a gentle slope through light foliage and logs, slewed to the left and came to rest about 135 metres beyond the end of the strip. As the aircraft stopped, the pilot and passengers saw flames in the cabin. The pilot's door had jammed shut because of fuselage damage, therefore all occupants evacuated quickly through the right door. Within seconds the aircraft was engulfed in flames. None of the passengers reported hearing the stall warning horn at any stage. They reported that the engine sounded as though it was producing take-off power even after they heard the tail hit the ground. Although the aircraft was substantially damaged by fire no pre-existing fault was found with the aircraft.

Because of the fire damage, the stall warning system could not be tested. The maintenance release was issued for operation in the aerial work category which did not embrace the requirements for this charter flight. The pilot reported that he had selected 1/4 flap for the take-off. The flaps were found in the up position after the accident; the flap selector may have been knocked up during the impact. The pilot estimated that the take-off weight was 1006 kg, which included 36 litres of AVGAS. Subsequent calculations showed that the take-off weight was 1017 kg, which was 49 kg below the maximum allowable weight. The pilot reported that he had checked the aircraft performance data before the flight and assessed that a 600-metre strip would be adequate for taking off over a 50 ft obstacle in nil wind conditions. None of the performance charts included factors for degradation of aircraft performance due to wear and tear, or for the slowing affects of sandy loam underlying a grass surface.

The operator reported that prior to conducting charter operations on French Island, two company pilots had measured the strip using vehicle odometers and recorded a length of 600 metres in the company's authorised landing area register. Using a calibrated wheel after the accident, the strip was re-measured and found to be only 500 metres long.

Occurrence summary

Investigation number 199701830
Occurrence date 03/06/1997
Location French Island (ALA)
State Victoria
Report release date 06/08/1997
Report status Final
Investigation type Occurrence Investigation
Investigation status Completed
Mode of transport Aviation
Aviation occurrence category Collision with terrain
Occurrence class Accident

Aircraft details

Manufacturer Cessna Aircraft Company
Model 177
Registration VH-DZC
Sector Piston
Operation type Charter
Departure point French Island Vic
Destination Moorabbin Vic
Damage Destroyed