# SDR UIEA2021092902142

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2021
- Submitted: September 30, 2021
- Operation: Air carrier
- Aircraft: [N1487A](https://openairdocs.org/aircraft/N1487A), registered now
- Make and model: Boeing 767-31K
- Registry model: [Boeing 767-31K](https://openairdocs.org/model/boeing-767-31k) (OpenAirDocs)
- Aircraft serial: 28865
- Aircraft time: 18,973 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Controller
- Condition: Erratic
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021092902142

## Discrepancy

AFT CABIN TEMP EICAS MSG ABOUT 3 HOURS IN CRUISE. RAN QRH TEMP IN ZONE DROPPED A COUPLE OF DEGREES TO 21C. PERFORMED BITE TEST OF THE ZONE TEMP CONTROLLER IAW B767AMM 21-61-00. OPS CKS GOOD. COULD NOT DUPLICATE.

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