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SDR AALA202303239642

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Service difficulty report · Bypass Valve · Boeing 777223

FAA SDR system

Difficulty date
February 9, 2023
Submitted
March 23, 2023
Operation
Air carrier
Aircraft
N751AN
Make and model
Boeing 777223
Aircraft serial
30798
Aircraft time
83,030 hours, 10,831 cycles
System (JASC)
2150 · Cabin Cooling System
Part
Bypass Valve
Part number
8102141
Condition
Unserviceable
Location
Zone 100 - Fuse
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT WAS GROUNDED: RETURNED TO MIA, AFT CABIN TEMPERATURE UNCONTROLLABLE WITH CURRENT AIR CONDITIONING MEL ITEMS. **SUPPLEMENTAL REPORT REQUIRED FOR AALA202302130552: MAINTENANCE REPLACED RIGHT AIR CYCLE MACHINE (ACM) PER AMM 21-52-00 (AALA202302130552), RIGHT ECONOMY COOLING VALVE PER AMM 21-52-31 (AALA202303236953), RIGHT SECOND STAGE TURBINE BYPASS VALVE PER AMM 21-52-32 (AALA202303239642), AND RIGHT DUAL HEAT EXCHANGER PER AMM 21-52-01 (AALA202303235628). ACCOMPLISHED SATISFACTORY OPERATIONAL AND LEAK CHECKS PER AMM 21-52-02.**(CLOSED)