# SDR 97ZZZM469

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N417AT](https://openairdocs.org/aircraft/N417AT), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 417
- Engine: Pwa PW124B
- System (JASC): [7540 · Bleed Air Indicating System](https://openairdocs.org/jasc/7540)
- Part: Over Temp Sw
- Part number: 32149582
- Condition: Failed
- Location: Lt Engine
- Stage of operation: CL
- Nature of condition: B, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZM469

## Discrepancy

OKC - FLT 3601 - ON CLIMB-OUT AFTER TAKEOFF, CREW REPORTED STRONG ELECTRIC SMELL IN CABIN, FOLLOWED BY LT PACK FAULT INDICATION.  AIRCRAFT RETURNED TO OKC LANDED WITHOUT INCIDENT.  CONTRACT MAINTENANCE INSPECTED AIRCRAFT BUT NO OBVIOUS DAMAGE WAS NOTED.  ITEM WAS DEFERRED UNDER MEL AND AIRCRAFT CONTINUED SERVICE.  LATER TROUBLESHOOTING FOUND THE NR 1 HP BLEED VAL AND OVERTEMP SWITCH TO BE THE CAUSE OF PACK FAULT.  ITEMS WERE REPLACED AND OPS CHECK WAS SATISFACTORY.  AIRCRAFT REMAINS IN SERVICE.  REF SIMA9700551.

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