# SDR 2002UALA00756

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2002
- Submitted: May 22, 2002
- Operation: Air carrier
- Aircraft: [N666UA](https://openairdocs.org/aircraft/N666UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29238
- Aircraft time: 12,254 hours, 4,166 cycles
- Engine: Pwa PW4052
- Engine time: 12,254 hours, 4,166 cycles
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Compressor
- Part serial: 27815
- Condition: Deteriorated
- Location: Nr 2 Engine
- Part time: 12,254 hours, 4,166 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002UALA00756

## Discrepancy

AT APPROX 300 AGL NR 2 ENGINE HAD A COMPRESSOR SURGE, MAX EGT 638F.  ENGINE EXPERIENCED A GROUP 3 SURGE.  SURGE IS CAUSED BY EXCESSIVE BLADE TIP CLEARANCES IN THE HPC REAR STAGES.  PERFORMED TEST-21 AND ENGINE FAILED.  ENGINE WAS REMOVED FOR SHOP REWORK.  AD 2001-25-11 ALREADY IN EFFECT FOR FLEET DETERIORATION MANAGEMENT.  FINAL FIX PENDING.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.