ASN Wikibase Occurrence # 70431
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Wednesday 28 January 2009 |
| Time: | 23:35 |
| Type: |  Boeing 757-258 |
| Owner/operator: | Ghana International Airlines |
| Registration: | G-STRZ |
| MSN: | 27622/745 |
| Year of manufacture: | 1997 |
| Engine model: | Rolls-Royce RB211-535E4 |
| Fatalities: | Fatalities: 0 / Occupants: 105 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Accra -
 Ghana
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Accra-Kotoka Airport (ACC/DGAA) |
| Investigating agency: | AAIB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
The aircraft had a blocked pitot tube, causing an airspeed discrepancy, which was detected early during the takeoff roll.
The commander decided to continue the takeoff and deal with the problem whilst airborne. After passing FL180 the crew selected the left Air Data switch to ALTN, believing this isolated the left Air Data Computer (ADC) from the Autopilot & Flight Director System (AFDS).
Passing FL316, the VNAV mode became active and the Flight Management Computer's (FMCs), which use the left ADC as their input of aircraft speed, sensed an overspeed condition and provided a pitch-up command to slow the aircraft. The co-pilot was concerned about the aircraft's behaviour and, after several verbal prompts to the commander, pushed the control column forward. The commander, uncertain as to what was failing, believed that a stick-pusher had activated. He disengaged the automatics and lowered the aircraft's nose, then handed over control to the co-pilot. A u201CMAYDAYu201D was declared and the aircraft returned to Accra. The operator's subsequent engineering investigation discovered the remains of a beetle-like creature in the left pitot system
Accident investigation:
 |
|
Sources:
https://www.gov.uk/aaib-reports/boeing-757-258-g-strz-28-january-2009
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Dec-2009 12:22 | harro | Added |
| 10-Dec-2009 12:23 | harro | Updated |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation