Service difficulty report · Shutoff Valve · Boeing 7673JHF

Difficulty date
August 10, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N643GT
Make and model
Boeing 7673JHF
Aircraft serial
37809
Aircraft time
5,607 cycles
Part
Shutoff Valve
Part number
2780540101
Part serial
0156
Condition
Faulted
Location
Apu
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

APU BLEED FUNCTION INOP(<P>FND APU DUCT PRESSURE DROP TO ZERO DURING L ENG START. PER AMM 71-00-00 PRFORM BOTH ENGINE DRY MOTORING, CONDITION NORMAL WITH GROUND PNEUMATIC SOURCE. TRANSFERRED TO MDDR 151273 IAW MEL 49-11-01-01 CAT C.</P> / <P>LP <SPAN>1483980: </SPAN><SPAN>REMOVED AND REPLACED APU SUPPLY SOV THEN OPER CHECK OK PER AMM 36-11-10/401. THIS CLEARS MDDR 151273.</SPAN></P>)

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