# SDR AALA201609149028

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2016
- Submitted: September 15, 2016
- Operation: Air carrier
- Aircraft: N203UW
- Make and model: Boeing 757-23N
- Registry model: [Boeing 757-23N](https://openairdocs.org/model/boeing-757-23n) (OpenAirDocs)
- Aircraft serial: 30548
- Aircraft time: 52,190 hours, 15,290 cycles
- Engine: Rroyce RB211535E437
- Engine time: 67,129 hours, 23,070 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: RB211535E43719D
- Part serial: 31218
- Condition: Odor
- Location: Nr 1
- Part time: 67,129 hours, 23,070 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201609149028

## Discrepancy

AIRCRAFT WAS GROUNDED: ON INITIAL DESCENT AS POWER REDUCED TO IDLE DEPARTING FL360, STRONG ODOR NOTICED ON FLIGHT DECK AND REPORTED BY F/A`S IN CABIN.  AT INTERMEDIATE LEVEL OFF WITH POWER ABOVE IDLE ODOR DISSIPATED SOMEWHAT-EVERY TIME POWER REDUCED ODOR RETURNED.  BOTH PACKS AUTO ENGINE BLEEDS ON APU OFF APU BLEED OFF.  CATEGORY A DIRTY SOCK, RANCID CHEESE ODOR-NO IRRITATION TO EYES OR NOSE.  REPLACED NR 1 ENGINE IAW TASK CARD 19L40071001.

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