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| Date: | Friday 14 March 2025 |
| Time: | |
| Type: |  Cessna 525 CitationJet CJ1 |
| Owner/operator: | Valljet |
| Registration: | F-HJAV |
| MSN: | 525-0473 |
| Year of manufacture: | 2001 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Near Paris-Le Bourget -
 France
|
| Phase: | Approach |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | Limoges-Bellegarde Airport (LIG/LFBL) |
| Paris-Le Bourget Airport (LBG/LFPB) | |
| Investigating agency: | BEA |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
On the flight, the crew were confronted with a barometric system failure. While passing the transition altitude, the pilots detect an inconsistency between the altitude values indicated on their PFD.
While the aircraft was established at FL 180 according to the information read on Captain's PFD , the crew informed air traffic control that they had a "problem with the altimeters on board." The crew told the controller that they were at FL 180 and asked him to confirm the flight level displayed on the radar screen. The controller informed the crew that they were at FL 180.
Subsequently, the fault processing led the crew to consider that the altitude indicated on the co-pilot's PFD was incorrect. The crew then selected ADC 1 as the altimetric source for both PFDs.
At around 18:30, the crew began the descent. Five minutes later, while the crew thought they were starting a level flight at FL 90 and were trying to contact CDG control, the aircraft was actually at a GNSS altitude of around 3,000 ft, descending with a vertical speed of around -270 ft/min.
In their testimony, the crew indicated that a TAWS PULL UP TERRAIN alert was triggered a few minutes later. The aircraft, supposedly level at FL 90, was then at a GNSS altitude of approximately 1,200 ft, or a height of approximately 700 ft, descending. The captain disconnected the autopilot, applied the power, and maneuvered visually.
The crew landed at Le Bourget airport at 18:58.
Accident investigation:
 |
|
Sources:
https://bea.aero/en/investigation-reports/notified-events/detail/serious-incident-to-the-cessna-525-registered-f-hjav-operated-by-valljet-on-14-03-2025-near-paris-le-bourget-ad/
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Apr-2025 14:23 | ASN | Added |
| 14-May-2025 19:32 | ASN | Updated [Total occupants, Nature, Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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