Service difficulty report · Sequence Valve · Boeing 727222

Difficulty date
August 7, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N7251U
Make and model
Boeing 727222
Aircraft serial
21398
Engine
Pwa JT8D15
Part
Sequence Valve
Part number
1U10851
Condition
Leaking
Location
Lt Mlg
Stage of operation
LD
Nature of condition
K, J
Precautionary procedure
O

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

What was found

ON GEAR EXTENSION AIRCRAFT LOST HYDRAULIC SYSTEM A. BOTH PUMPS RAN TO ZERO HYDRAULIC FLUID QUANTITY. *S/D* REPLACED NR 1 AND NR 2 ENGINE DRIVEN HYDRAULIC PUMPS AND REPLACED LT MLG LOCK OPERATED SEQUENCE VLV PER MAINTENANCE MANUAL. PERFORMED NORMAL RETRACTION AND MANUAL EXTENSION TESTS, NO IRREGULARITIES FOUND.