SDR SWAA040404

Service difficulty report · Check Valve · Boeing 7377H4

Difficulty date: February 7, 2004
Submitted: February 18, 2004
Operation: Air carrier
Aircraft: N723SW
Make and model: Boeing 7377H4
Aircraft serial: 27855
Aircraft time: 18,546 hours, 10,946 cycles
System (JASC): 2916 · Hydraulic Reservoir, Main
Part: Check Valve
Part number: V83533
Condition: Faulty
Location: Hyd Reservoir
Stage of operation: CR
How discovered: O
Nature of condition: K, B
Precautionary procedure: A

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

What was found

AIR TURNBACK, STRONG ODOR OF OIL OR HOT PLASTIC, MOST NOTICEABLE AT HIGH POWER SETTINGS. SWITCHED TO APU INFLIGHT, SLIGHT IMPROVEMENT. ALSO, SLIGHT IMPROVEMENT AT IDLE. NO VISIBLE SMOKE. REMOVED AND REPLACED A-SYSTEM HYDRAULIC RESERVOIR HEAD PRESSURE CHECK VALVE PER MM.

More about the Boeing 737-7H4