Service difficulty report · Unknown · Boeing 757231

Difficulty date
July 1, 2023
Submitted
July 3, 2023
Operation
Air carrier
Aircraft
N721TW
Make and model
Boeing 757231
Aircraft serial
29954
Aircraft time
85,099 hours, 21,962 cycles
Part
Unknown
Part number
UNKNOWN
Condition
Unknown
Location
Unknown
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
B, A, I

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

What was found

SHIP 6810 -DIV/DE - TO MSP DUE TO RIGHT BLEED OFF INDICATION. CABIN PRESSURIZATION WARNING APPEARED AT FL360, EMERGENCY DECENT AND OXYGEN MASKS WERE USED. CORRECTIVE ACTION: T/S FOUND HOSE BLOWN OFF BETWEEN ACM AND HEAT EXCHANGER. REPLACED HOSE IN #1 PACK BAY, REPLACED SEAL AND DUCT CABLE, FOUND ELBOW GALLED ON LEFT ENGINE PRSOV, REPLACED MUSCLE LINE. R/R LT RFCC, TIGHTENED B NUT @REPLACED HPSOV SEAL, R/R HP VALVE, REPLACED REV FLOW CONTROLLER. PACK OPS CK NORMAL, NO LEAKS. C/W NO GO ODI.