Service difficulty report · Connector · Boeing 757324

Difficulty date
October 8, 2024
Submitted
October 11, 2024
Operation
Air carrier
Aircraft
N74856
Make and model
Boeing 757324
Aircraft serial
32815
Aircraft time
60,559 hours, 19,632 cycles
Part
Connector
Condition
Faulted
Location
Zone 100
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
A

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

What was found

R STRUT OH DET 1 STATUS MESSAGE COULD NOT DUPLICATE STATUS MSG. ITEM PLACED ON MEL REF LOG PG. 9498053 RT ENG OVHT BEGIN T/S PER TSM 26-11 TASK 803. RECORD ALL FINDINGS DURING PROGRESS.PERFORMED FIM 26-11 TASK 803 THROUGH BLOCK 3. NO DEFECTS FOUND. FURTHER T/S REQUIRED. RAN RIGHT ENG & CYCLE BLEED SW CLOSE & OPEN ALSO CYCLE ISOLATION VALVES CLOSE & OPEN UNABLE TO GET AIR PRESS TO THE RT ENG. BLEED LIGHT STAYED ON. PACKS ON BUT NO AIR PRESS INDICATION. ITEM PLACED ON MEL. PRSOV IS CLOSED. DEFERRED RT ENG BLEED CLOSED REF 3611N PROCEDURE A. RECHECKED AMM PROCEDURE AFTER MIDNIGHTS TURNOVER, FOUND THAT CONNECTOR PLUG FOR RFCC DID NOT NEED TO BE JUMPERED IN STEP F(8)(B) PERFORMED HPSOV AND HS PILOT TEST IN REF TO AMM 36-00-23-705-151-001. FOUND HPSOV GOOD. HS PILOT FAILED TEST. PERFORMED FAMV TEST IN REF TO AMM 36-00-23-705-153-001. FAMV FAILED TEST ON STEP G(20). REPLACE FAMV. PRSOV AND RFCC TESTS ARE STILL REQUIRED TO BE ACCOMPLISHED IN ORDER TO FINISH PNEUMATIC SYSTEM HEALTH CHECK. PERFORMED HPSOV TEST IAW AMM 36-00-23-705-151-001 USING METHOD 1 UP TO STEP 2.G. (13 A 2). SUSPECT HPSOV INOPERATIVE, VALVE FOR OUR P/N. RESTARTED AMM TASK 36-00-23-705-151-001. STEP G(16), PC DID NOT GO TO LESS THAN 4PSIG. REPLACE HS PILOT. M&E # 19-3611-9-0001. DOESN'T OPEN. REQ'S FURTHER T/S FOR ENG. OVERHEAT. REMOVED JUMPER FROM RFCC VALVE CONNECTOR PLUG. JUMPER NEEDS TO BE INSTALLED FOR FURTHER T/S.