# SDR CALA2021090301504

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2021
- Submitted: September 3, 2021
- Operation: Air carrier
- Aircraft: [N76517](https://openairdocs.org/aircraft/N76517), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31628
- Aircraft time: 42,343 hours, 14,657 cycles
- System (JASC): [2435 · Starter-Generator](https://openairdocs.org/jasc/2435)
- Part: Starter Gen
- Part number: 28B5459
- Condition: Failed
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2021090301504

## Discrepancy

ON TAXI IN WE GOT A STRONG ELEC SMELL WHICH COENSIDED WITH THE M AX CABIN AIR FLOW PROCEED QUESTIONAIR PICTURE ONCE ABLE TO BOARD AIRCRAFT FOUND A SLIGHT RESIDUAL ELECTICAL SMELL. MOSTLY IN THE FWD GALLEY AREA AND FLIGHT DECK INSPECTED APU AIR INLET NO DEFECTS NOTED REF AMM 05-51-26. PERFORMED CONDITIONAL INSPECTION OF FLIGHT DECK, NO CIRCUIT BREAKERS WERE POPPED, ALL LIGHTING IN FLIGHT DECK OPS CHECKS GOOD.  RAN OVENS AND COFFEE MAKERS IN GALLEY''S, QUESTIONAIR FORM, ODOR/SMELL OCCURRED AFTER LANDING AND DURING NO DEFECTS OR ODORS.  BASED ON COMPLETED ODOR IN CABIN THEY NOTICED IT. SUSPECT PLACARDED APU STARTER GENERATOR DURING APU START AS A POSSIBLE CAUSE. SEE LOGPAGE 6946122 FOR R&R. RAN FLIGHT CREW STATED ODOR HAD STARTED TO DISAPATE SHORLY AFTER OF APU AIR FOR SINGLE ENGINE TAXI IN OPERATIONS. VERBALLY FROM MAXIMIZING CABIN AIR FILTRATION PILOT BULLETIN 21-237. THE USE PACKS FOR OVER AN HOUR IN THE SAME PILOT BULLETIN CONFIGURATION WITH NO DEFECTS. PERFORMED ENGINE RUN, RAN PACKS WITH BOTH ENGINES NO ODORS PRESENT

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