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| Date: | Wednesday 1 March 1995 |
| Time: | 22:53 |
| Type: |  Airbus A310-325 |
| Owner/operator: | Tarom |
| Registration: | YR-LCA |
| MSN: | 636 |
| Year of manufacture: | 1992 |
| Engine model: | P&W PW4156A |
| Fatalities: | Fatalities: 0 / Occupants: 94 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Location: | Near Rivière-du-Loup, Quebec -
 Canada
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Chicago O’Hare International Airport (ORD/KORD) |
| Amsterdam Schipol Airport (AMS/EHAM) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight was in cruise, en route from Chicago, Illinois, USA, to Amsterdam, the Netherlands, at FL330 at a speed of Mach 0.83, with autopilot 2 engaged. Shortly after the crew received a clearance to proceed to the ocean-boundary fix, the autopilot disengaged. The aircraft climbed rapidly with a maximum vertical g of 1.94 recorded within five seconds of the autopilot disconnect. At times during the rapid ascent, the rate of climb exceeded 12,000 feet per minute and the maximum pitch angle was nearly 30 degrees. The aircraft reached a maximum altitude of FL385, at a minimum indicated speed of 155 knots. Four stall warning events occurred, commencing at the peak altitude of the manoeuvre and continuing as the aircraft began a rapid descent. The descent continued at rates sometimes greater than 12,000 feet per minute, to FL315 where the aircraft began a rapid climb again. Autopilot 1 was successfully engaged (several engagement attempts were made during the descent) and the climb moderated. The aircraft levelled at FL350 and was then cleared by Moncton Centre (New Brunswick) to maintain that altitude. The flight continued to its destination with no further reported problems. There was no traffic conflict during the flight upset, and no injuries or aircraft damage were reported. The Board determined that the flight upset manoeuvre was caused by a misrigged autopilot elevator servo control, which led to an initial pitch-up, and by the crew's ineffective or inappropriate pitch control inputs which led to aircraft stall. Contributing factors in the flight upset were the aft centre of gravity position and the aircraft's high speed.
Accident investigation:
 |
|
Sources:
TSB
https://www.jetphotos.com/photo/7969264
History of this aircraft
Other occurrences involving this aircraft
| 24 September 1994 | YR-LCA | Tarom | 0 | Paris-Orly Airport (ORY/LFPO) |  |
non |
| Loss of control | ||||||
| 9 November 2024 | EP-MDK | Iran Airtour | 0 | near Dubai Airport (DXB/OMDB) |  |
non |
| Wake vortex encounter | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Oct-2024 07:02 | Justanormalperson | Updated [Time, Total fatalities, Total occupants, Phase, Nature, Departure airport, Destination airport, Source, Damage, ] |
| 12-Feb-2025 19:16 | ASN | Updated [Operator, ] |
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