# SDR TSAA0336200

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2003
- Submitted: January 13, 2004
- Operation: Air carrier
- Aircraft: N743AL
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 28654
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Switch
- Part number: 1296662
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TSAA0336200

## Discrepancy

CLIMBING THROUGH ABOUT 7000 FEET THE LT ENGINE BLEED TRIP LIGHT ILLUMINATED.  QRH ACCOMPLISHED.  A RESET WAS ATTEMPTED THREE TIMES.  RETURNED TO HNL.  OVERWEIGHT LANDING AT 147,500 LBS.  TOUCHDOWN RATE OF DESCENT LESS THAN 300 FPM.  REMOVED AND REPLACED 390 DEGREES FAHRENHEIT PRE-COOLER VALVE SENSOR P/N 975-0172-006, IAW 36-12-03-4.  OPS CHECK GOOD.  VERIFIED NO BLEED TRIP OFF LIGHT ILLUMINATED.  REPLACED 490 DEGREES FAHRENHEIT OVERTEMP SWITCH.  RAN ENGINES OPS CHECK GOOD.  ACCOMPLISHED OVERWEIGHT LANDING CONDITIONAL INSPECTION IAW 05-51-35-2.  NO DEFECTS NOTED.  AIRCRAFT RETURNED TO SERVICE.  (M)

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