# SDR ABXA2016216004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2016
- Submitted: February 22, 2016
- Operation: Air carrier
- Aircraft: N788AX
- Make and model: Boeing 767281
- Aircraft serial: 23021
- Aircraft time: 55,236 hours, 41,618 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Coupling
- Part number: 631800SH
- Condition: Failed
- Location: Ac Bay
- 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/ABXA2016216004

## Discrepancy

WITH THE EQUIPMENT COOLING SWITCH IN OVRD POSITION & BOTH PACKS OPERATING AT 39,000 FEET, THE CABIN ALTITUDE CLIMBED TO 11,000 FEET.  THE FLIGHT CREW DESCENDED TO 10,000 FEET TO REGAIN PRESSURIZATION.  REPLACED THE COUPLING & SEAL THAT JOINS THE CONDITIONED AIR GND CONNECTOR TO THE ADJACENT T DUCT.  THE CAUSE OF THE CABIN ALTITUDE CLIMB WAS THE FAILED COUPLING ABOVE THE CONDITIONED AIR GND CONNECTOR.

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