Aviation safety investigations & reports

Gates Learjet Corporation 35A, VH-JIG, Avalon Airport, Vic, 24 June 1998

Investigation number:
199802529
Status: Completed
Investigation completed

Summary

The handling pilot was undergoing a scheduled 6-monthly proficiency check in the Learjet, under the supervision of an experienced instructor who occupied the right control seat. The flight was planned to depart from Essendon and proceed to the Ripley locator, for an entry into the holding pattern, before making a locator approach to Avalon. Three touch-and-go circuits were planned at Avalon, including one 700-ft asymmetric low level circuit following a simulated engine failure at V1. The aircraft was then to return to Essendon via the Plenty locator for an instrument landing system (ILS) approach.

The instructor briefed the exercise in detail and, because the pilot under check had low experience in the Learjet, it was decided that the instructor would handle all radio communications and conduct the necessary check sequences. The instructor also indicated that it was company policy for the aircraft be landed with less than full flap during an asymmetric landing. The aircraft was to be landed with flap 20 at Vref +10 kts.

The flight proceeded normally up to the point of the simulated engine failure at V1. When the instructor simulated a right engine failure by placing the thrust lever in the IDLE position, the aircraft drifted to the right. Intervention by the instructor enabled the aircraft to return to balanced flight. The handling pilot continued to carry out the 700-ft circuit in the after-takeoff configuration of gear UP and flap 8. Flap 20 was selected during the base turn. The aircraft was flared normally with both thrust levers in the IDLE position. As the aircraft settled, a slight vibration was noticed, and both pilots became aware that the landing gear was still selected UP. Go-round power was applied and the aircraft climbed away. The landing gear was cycled normally and the aircraft returned for a full stop landing. A subsequent inspection of the aircraft showed that the only evidence of a runway strike was abrasion of the lower fuselage mounted very high frequency (VHF) blade antenna.

A subsequent investigation revealed that the pilot under check was allocated one hour of Learjet flying every 3 months. The instructor had selected the flight sequences to give the pilot the maximum handling exposure in the limited time available. In doing so, the normal two-crew, challenge and response routines were abandoned and the checks had to be accomplished by the instructor alone. The instructor became distracted by the asymmetric handling issues, and the demands of the low-level circuit, subsequently forgetting the relevant downwind and pre-landing checks. The handling pilot, who had been absorbed with controlling the aircraft, had lost situational awareness and did not notice the lack of check procedures by the instructor, or the lack of a positive gear-down indication.

The approach had been carried out with flap 20 extended, rather than full flap (flap 40), because the operator had previously experienced a partial loss of control during training when attempting an asymmetric go-around at flap 40. However, with flap 20 selected, the landing gear warning system was inhibited, contributing to the late realisation that the landing gear was not extended. The flap 20 asymmetric approach configuration was not in accordance with the manufacturer's flight manual recommendations.

Safety Action

As a result of this occurrence, the Bureau of Air Safety Investigation is investigating an apparent safety deficiency concerning recurrency flight training. Any safety recommendation resulting from this issue will be published in the Bureau's Quarterly Safety Deficiency Report.

As a result of this occurrence, the operator has:

  1. Amended the company operations manual to specifically prohibit either a check pilot or trainee accepting any variation to the normal challenge/response check-list procedures; and
  2. Amended the company operations manual to require that all asymmetric landings be conducted in accordance with the requirements of the aircraft flight manual.
General details
Date: 24 June 1998   Investigation status: Completed  
Time: 1200 hours EST    
Location   (show map): Avalon, Aero.    
State: Victoria   Occurrence type: Ground strike  
Release date: 27 April 1999   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Gates Learjet Corp  
Aircraft model 35  
Aircraft registration VH-JIG  
Serial number 35-400  
Type of operation Flying Training  
Damage to aircraft Minor  
Departure point Essendon, VIC  
Destination Essendon, VIC  
Crew details
Role Class of licence Hours on type Hours total
Pilot-in-Command ATPL 1st Class 3000.0 17000
Last update 13 May 2014