ASN Aircraft accident Boeing 747-230F D-ABYU Hong Kong-Kai Tak International Airport (HKG)

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Accident description

Last updated: 20 May 2013

Status:	Final
Date:	18 OCT 1983
Time:	21:07
Type:	Boeing 747-230F
Operator:	Lufthansa
Registration:	D-ABYU
C/n / msn:	22668/538
First flight:	1981-08-13 (2 years 2 months)
Total airframe hrs:	10223
Cycles:	1659
Engines:	4 General Electric CF6-50E2
Crew:	Fatalities: 0 / Occupants: 3
Passengers:	Fatalities: 0 / Occupants: 0
Total:	Fatalities: 0 / Occupants: 3
Airplane damage:	Substantial
Airplane fate:	Repaired
Location:	Hong Kong-Kai Tak International Airport (HKG) (Hong Kong)
Phase:	Takeoff (TOF)
Nature:	Cargo
Departure airport:	Hong Kong-Kai Tak International Airport (HKG/VHHH), Hong Kong
Destination airport:	Dubai Airport (DXB/OMDB), United Arab Emirates

Narrative:
A Boeing 747-230F cargo jet sustained substantial damage in a runway excursion accident at Hong Kong-Kai Tak International Airport (HKG). None of the three crew members was injured.
The airplane operated flight LH683 from Hong Kong (HKG) to Frankfurt (FRA), Germany via Dubai (DXB). During the night take-off from Hong Kong a malfunction of the No. 2 engine occurred, and the take-off was subsequently rejected from a high speed. In the later stages of the deceleration the aircraft veered off the paved surface of the runway onto soft ground.
The calculated V1 for the take-off was 157 knots, and VR 168 knots. The call to reject takeoff was made at a speed between 156 and 167 knots IAS.

CAUSE: "The accident was caused by the take-off being rejected at high speed, probably in excess of V1, at a point where the remaining runway length was insufficient to ensure a safe stop. A number of factors contributed to the aircraft having used more runway distance to reach the reject point than that scheduled in the Airplane Flight Manual, thus diminishing the available braking distance. An attempt to remedy the problem experienced with the Number 2 engine was responsible for the take off not being abandoned at an earlier stage. The reason for the aircraft leaving the runway paved surface has not been determined."

Events:

Sources:

Official accident investigation report

investigating agency:	CAD Hong Kong
report status:	Final
report number:	AAR 1-87
report released:	01-MAR-1987
duration of investigation:	1230 days (3 years 4.5 months)
download report:	Report on the accident to Boeing 747F D-ABYU at Hong Kong International Airport on 18 October 1983 (CAD Hong Kong AAR 1-87)

Follow-up / safety actions

CAD Hong Kong issued 5 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

Map

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Hong Kong-Kai Tak International Airport to Dubai Airport as the crow flies is 5911 km (3694 miles).

languages:

Issued: -MAR-1987	To: Airlines	Safety Recommendation AAR 1-87 (1)
Operators ensure their published take-off performance calculations include an allowance for loss of effective runway length incurred by the line-up manoeuvre. Airport authorities should publish all information necessary to enable appropriate calculations to be made.
Issued: -MAR-1987	To: Airlines	Safety Recommendation AAR 1-87 (2)
Operators consider prohibiting rolling take-offs if the aircraft take-off weight is close to the maximum permissible for the particular runway and prevailing conditions.
Issued: -MAR-1987	To: Airlines	Safety Recommendation AAR 1-87 (3)
Operators who do not already do so examine the desirability of bugging V1 and VR prior to commencement of take-off.
Issued: -MAR-1987	To: Manufacturers and airworthiness authorities	Safety Recommendation AAR 1-87 (4)
Manufacturers and airworthiness authorities seek a method of indicating to the flight crew whether achieved aircraft acceleration on take-off is at least equal to AFM predicated values.
Issued: -MAR-1987	To: Boeing	Safety Recommendation AAR 1-87 (5)
The aircraft manufacturer investigates the practicality of making available a retrospective modification designed to minimise damage resulting from nosegear collapse in respect of pre-line position 580 Boeing 747 aircraft.