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| Date: | Monday 11 June 2012 |
| Time: | 15:57 |
| Type: |  Bombardier CRJ-900LR |
| Owner/operator: | Lufthansa Regional, opb Lufthansa CityLine |
| Registration: | D-ACKC |
| MSN: | 15078 |
| Engine model: | GE CF34-8C5 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Other fatalities: | 0 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Budapest FIR -
 Hungary
|
| Phase: | En route |
| Nature: | Ferry/positioning |
| Departure airport: | Timisoara |
| München-Franz Josef Strauss Airport (MUC/EDDM) | |
| Investigating agency: | TSB Hungary |
| Confidence Rating: |  Accident investigation report completed and information captured |
Flight LH9949, a CRJ-900 (D-ACKC), took off from Timisoara to Munich for a technical transfer flight with an inoperative TCAS system. The aircraft requested clearance for climbing from FL320 to FL330 while flying near BUG VOR. The ATC repeated the clearance to the pilots at the time of transferring their aircraft to the ATC of the next
sector and also told them the new frequency. The pilots, however, misunderstood the ATC and started climbing to FL360.
As a consequence, the separation between LH9949 and another aircraft (NLY2803, OE-LEU, A320) flying at FL340. At the moment of breach of vertical separation minimum the horizontal separation was 2.6 NM. When the two aircraft was situated at the same altitude the hotizontal separation got reduced to 1.9 NM. When the required vertical separation was reached again, the horizontal separation was 0.7 NM.
There was no reported damage or injury related to this serious incident.
The IC believes that the flight crew of DLH9949 oveshoot the altitude without clearance and this mistake led to the serious incident.
Accident investigation:
 |
|
Sources:
BFU 6X005-12
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Apr-2025 19:14 | ASN | Updated [Aircraft type, Registration, Cn, Operator, Location, Phase, Nature, Departure airport, Destination airport, Source, Narrative, Accident report, ] |
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