# SDR AALA20160404006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2016
- Submitted: April 4, 2016
- Operation: Air carrier
- Aircraft: [N942NN](https://openairdocs.org/aircraft/N942NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33492
- Aircraft time: 7,672 hours, 2,658 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 510901601
- Part serial: 5109016000347
- Condition: Faulty
- Location: Ac Bay
- Stage of operation: CL
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20160404006

## Discrepancy

AIRCRAFT WAS GNDED.  AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL & ACFT WAS OVERWEIGHT.  DURING CLIMB, FWD CABIN DUCT TEMP REACHED 140 DEGREES C.  CONT CAB & FWD CABIN, ILLUMINATED, UNABLE TO CONTROL.  R & R TRIM AIR MODULATION FWD VLV V144 IAW AMM 21-61-21, ZONE TEMP CONTROLLER M1443 IAW AMM 21-61-17 & AIR CONDITIONING ACCESSORY UNIT M324 IAW AMM 21-51-02.  OPERATIONAL CHECKED GOOD.  SEE ALSO AALA 20160403001 & AALA 20160404005.

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