Aircraft Type: MD-83
| Summary |
The loss of power of the engines was a major contributing factor to the accident. |
| Aircraft Type |
MD-83 |
| Year of Manufacture |
1990 |
| Serial Number |
53019 |
| Registration |
5N-RAM |
| Total Airframe time |
60850:47hrs |
| Certificate of Airworthiness |
Issued 16th September, 2011 |
| Category |
Transport (Passenger) |
| Certificate of Registration |
Issued 3rd February, 2009 |
| Operator |
Dana Airlines Ltd |
FIGURE 7: THE AIRCRAFT BEFORE THE ACCIDENT
| Synopsis – Loss of Power of the Engines |
The number one causal factor of the accident was identified to be the loss of power on the two engines. Engine number 1 lost power seventeen minutes into the flight. Thereafter, on final approach, Engine number 2 lost power and failed to respond to throttle movement on demand for increased power to sustain the aircraft in its flight configuration.
The investigation focussed on why the two engines lost power, resulting in the following findings:
- No anomalies were found in the aircraft technical logs.
- The aircraft had undergone an inspection two days prior to the crash.
- Fueling records indicated the accident flight had adequate fuel. The type of fuel used was JET-A1.
- Preliminary analysis of fuel samples from the refuelling truck and the supply tank were negative for contamination.
- There was little to no damage to the engine fan blades, consistent with low thrust engines (not fully powered).
- The engines were overhauled at Millenium Engine Associates Inc. in Miami Florida (engine 1 in August 2011, and engine 2 in December 2011). Records showed that Service Bulletin 6452 was not accomplished on engine 1, but it was on engine 2.
- A Powerplant group comprised of members from the Nigeria Accident Investigation Bureau, the National Transportation Safety Board, Federal Aviation Administration, P&W, and Boeing convened at the Millennium Engine Associates engine facility in Miami, Florida to disassemble and exam both engines involved in the Dana Airlines accident. The group commenced work on October 8, 2012 and completed the engine disassembly and examination on October 12, 2012.
- Examination and disassembly of the No. 1 engine did not identify any mechanical condition which would have prevented normal operation of the engine at the time of impact.
- Examination and disassembly of the No. 2 engine did not identify any mechanical condition which would have prevented normal operation of the engine at the time of impact.
|
| Details |
Details of the Aircraft are contained in the following document, and specific sections:
https://aib.gov.ng/wp-content/uploads/2019/09/dana-airlines-md83-5n-ram.pdf
- 1.6 Aircraft Information
- Appendix A – Engine Exam and Disassembly Field Notes
- Appendix F – Preliminary Inspection Report
- Appendix G – Engineering Authorization
- Appendix I – Metallurgical Test of the Fuel Manifold Component Report
Further details related to the engines are contained in the following web pages in this ARGUE web report:
- Conclusions
- Similar Occurrences
|
Damage to Aircraft
| Details are contained in in the following document, and specific sections:
|
Wreckage and
Impact Information
| Details are contained in in the following document, and specific sections:
|
