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| Date: | Tuesday 31 August 1999 |
| Time: | 08:38 |
| Type: |  British Aerospace BAe-146-300 |
| Owner/operator: | Aer Lingus Commuter |
| Registration: | EI-CLG |
| MSN: | E3131 |
| Fatalities: | Fatalities: 0 / Occupants: 75 |
| Other fatalities: | 0 |
| Aircraft damage: | Minor |
| Location: | Over Daventry, Northamptonshire -
 United Kingdom
|
| Phase: | Initial climb |
| Nature: | Passenger - Scheduled |
| Departure airport: | London-Stansted Airport (LTN/EGGW) |
| Dublin Airport (DUB/EIDW) | |
| Investigating agency: | AAIB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The aircraft was on a scheduled service from London Stansted Airport to Dublin and was climbing
to FL220. On passing FL190 the Autopilot tripped out, warning flags appeared on the commander's
ADI (Attitude Direction Indicator) and, at the same time, a 'GEN OFF LINE' caption illuminated
for the No 1 electrical generator and the caption 'ELECT' appeared on the Master Warning panel.
The commander took manual control of the aircraft and he and the first officer felt a change of
pressure in their ears. They checked the Pressurisation panel on the flight deck and saw the cabin
pressure indicator showing a rate of descent of some 1,800 to 2,000 feet/min. The crew switched
the Pressurisation controller to MANUAL mode and selected the cabin air discharge valves to fully
shut.
As a precaution the crew donned oxygen masks and requested descent to FL100. They were then
further cleared down to FL80 and confirmed to ATC that they would like to declare an emergency
and that they had electrical and pressurisation problems. After evaluation of the situation at FL80
they requested a downgrade of the Emergency and a diversion to Manchester so that the No 1
electrical generator could be examined. During the descent the commander instructed the first
officer to start the APU. The landing at Manchester was normal and there was no injury to crew or
passengers.
Accident investigation:
 |
|
Sources:
https://assets.publishing.service.gov.uk/media/5422f23ded915d13710003d1/dft_avsafety_pdf_500915.pdf
https://www.jetphotos.com/photo/10472334 (Photo)
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2025 08:11 | Justanormalperson | Added |
| 02-Apr-2025 08:11 | ASN | Updated [Accident report, ] |
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