# SDR TSAA0136137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 16, 2001
- Submitted: November 2, 2001
- Operation: Air carrier
- Aircraft: [N739AL](https://openairdocs.org/aircraft/N739AL), registered now
- Make and model: Boeing 737-73A
- Registry model: [Boeing 737-73A](https://openairdocs.org/model/boeing-737-73a) (OpenAirDocs)
- Aircraft serial: 28500
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Seal
- Part number: 32895625
- Condition: Worn
- Location: Bleed Air Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TSAA0136137

## Discrepancy

FLT 478 - HNL-OAK/LAS - AFTER MX ACTIONS, DEPARTED HNL AND HAD NR 2 BLEED TRIP OFF, CLIMBING THROUGH 25,000 FEET.  RESET AND TRIPPED AGAIN AT 26,500 FEET.  RETURNED TO HNL, UNEVENTFUL LANDING.  REPLACED WORN KISS SEAL P/N 32895625, (FAN AIR VALVE) JUST AFT OF NR 2 ENGINE PRECOOLER CONTROL VALVE, P/N 82C100201.  REPLACED THE NR 2 ENGINE PRECOOLER CONTROL VALVE AS A PRECAUTION IAW MM 36-12-02, PAGE 401-408.  OPS CHECK OK ON GROUND.  AIRCRAFT RETURNED TO SERVICE.  (M)

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