What was found
DURING CLIMB, THE NR 4 HYDRAULIC SYSTEM LOW QUANTITY LIGHT ILLUMINATED. AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPLACED THE NR 4 HYDRAULIC SHUTOFF VALVE. OPERATIONAL CHECK GOOD.
- Difficulty date
- April 25, 1999
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N641NW
- Make and model
- Boeing 747212B
- Aircraft serial
- 21941
- System (JASC)
- 2910 · Hydraulic System, Main
- Part
- Valve
- Part number
- AV16E12154
- Condition
- Leaking
- Location
- Nr 4 Hyd Syst
- Stage of operation
- CL
- Nature of condition
- K
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.