ASN Wikibase Occurrence # 326862
| Date: | Saturday 10 January 1987 |
| Time: | 13:50 |
| Type: |  McDonnell Douglas DC-10-30 |
| Owner/operator: | Nigeria Airways |
| Registration: | 5N-ANR |
| MSN: | 46968/243 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 29487 hours |
| Cycles: | 8748 flights |
| Engine model: | General Electric CF6-50C |
| Fatalities: | Fatalities: 0 / Occupants: 9 |
| Aircraft damage: | Destroyed, written off |
| Category: | Accident |
| Location: | Ilorin Airport (ILR) -
 Nigeria
|
| Phase: | Landing |
| Nature: | Training |
| Departure airport: | Lagos-Murtala Muhammed International Airport (LOS/DNMM) |
| Ilorin Airport (ILR/DNIL) | |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight originated from Lagos, Nigeria, at 13:20 hours local time as a training flight. The training flight commenced from Lagos with the trainee Captain on the left seat as the Pilot Flying while the Instructor Captain was on the right seat as Pilot-in-Command. The point of intended landing and subsequent trainings was Ilorin Airport.
Flight preparation was completed by the crew and ground dispatchers with 60.3 metric tonnes of fuel up-lift giving an estimated endurance of 8 hours.
The flight was normal up till the altitude of 3,000ft when the aircraft was inside the control zone of Ilorin Control Tower which had cleared the aircraft for a touch and go on runway 05. At 1000 ft AGL the aircraft had its landing gears in the down position and landing flaps set at 35. At 400 ft AGL the auto-pilot was disconnected and later at 80 ft the autothrottles were also disconnected. The aircraft was fully established on the ILS.
As the trainee captain was on his very first flight on the aircraft type, the Nigeria Airways DC-10 flight transition syllabus item 9 has it that the sequence of training at this point in time should be '3 engine or single land demonstration-Full stop'. As the aircraft had already requested and cleared for a touch and go and established on ILS, it was clear that item 9 had been skipped and item 10 "3 engine Flight Director ILS approach -Touch and Go" was in progress.
The trainee captain crossed the 05 threshold rather high at about 60 ft or more and a long time, interspersed with instructions by the instructor captain, was spent before the aircraft had its main landing gears on the ground at about 2,913 ft (888 m) from the threshold. Runway 05 had a Landing Distance Available if 3100 m.
It appeared that the trainee captain did not receed the throttles fully back for the touch-down and the Instructor had to assist in doing so.
The trainee captain then appeared to be holding the nose-wheel off the ground and again the Instructor had to push the control column down.
On nose-wheel touch-down, the trainee immediately requested for take-off power.
The Instructor went into the aircraft re-configuration procedure after the landing and was still busy on the required settings when the trainee Pilot raised an alarm as the runway threshold was approaching.
The Instructor looked out into the 900m of slight haze visibility, felt that the aircraft would not take-off with the limited runway available and immediately reached out to deploy the spoilers at the same time stepped on the brakes. Abort take-off was not announced.
At this point in time the engine throttles had already been advanced for take-off.
Tha aircraft was on heavy braking from about 1,390 ft (424 m) before runway end as it overran the runway.
The aircraft made significant impacts with the ILS antenna bars, electrical switch posts and the approach light support structures of runway 23 all located on the runway 05 clearway before it came to a halt.
The location of the accident site was 44 meters to the left of the centre-line and 649 meters along the extended centre-line. A fire erupted and consumed the fuselage.
Probable Cause:
The probable cause of the accident is primarily the amount of runway consumed in effecting the landing coupled with the lack of knowledge, with certainty of the position of the throttle levers by both the instructor and the trainee pilot in a crucial moment of deciding either to continue the take-off or abort. The break-down of communication and co-ordination between the instructor, the trainee pilot and the trainee flight engineer led to the subsequent overrun.
Contributory Factors:
1. The absence of uniform flight standards especially on procedures, within the Nigeria Airways Ltd. in that simulator trainings are not a progressive and logical sequence to flying the live aircraft.
2. The extent of the accident was aggravated by the repeated collisions with solidly constructed approach light supporting structures which caused the fire and the shoddy performance of the airport fire serviees.
3. The visibility was too close to the minima for a training flight.
Sources:
Civil Aircraft Accident Report No. CIA 126
Location
Images:
photo (c) AIPB Nigeria; Ilorin Airport (ILR); January 1987
photo (c) Oskam-Neveen; Amsterdam-Schiphol Airport (AMS)
Revision history:
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