SDR QV12004F00000

Service difficulty report · Humidifier · Boeing 737*

Difficulty date: December 25, 2003
Submitted: January 13, 2004
Operation: Air carrier
Aircraft: N737GG
Make and model: Boeing 737*
Aircraft serial: 29136
Engine: Ge CFM56*
System (JASC): 2570 · Accessory Compartment
Part: Humidifier
Condition: Malfunctioned
Location: Cabin
Stage of operation: NR
How discovered: O
Nature of condition: B
Precautionary procedure: A

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

What was found

DURING TEST FLT, FOLLOWING MAINTENANCE INPUT. SMOKE REPORTED IN CABIN AT 31000 FT. AIRCRAFT RETURNED TO AIRPORT. ON INVESTIGATION, CABIN HUMIDIFIER CONTROL CIRCUIT BREAKER C9124 ON AUX POWER DISTRIBUTION PANEL P9101 FOUND TRIPPED. CABIN HUMIDIFIER SYSTEM DEACTIVATED FURTHER INVESTIGATION TO BE CARRIED OUT WHEN AIRCRAFT IS AVAILABLE. TEST FLIGHT REPEATED, NO FURTHER SMOKE REPORTED. NOTE: HUMIDIFIER IS NON-ESSENTIAL EQUIPMENT.