SDR I5EA2020100500001

Service difficulty report · Clamp · Boeing 737401

Difficulty date: September 2, 2020
Submitted: October 5, 2020
Operation: Air carrier
Aircraft: N804TJ
Make and model: Boeing 737401
Aircraft serial: 23988
Aircraft time: 70,509 hours, 46,757 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Clamp
Condition: Loose
Location: Lt Wing Anti Ice
Stage of operation: CR
How discovered: V
Nature of condition: J
Precautionary procedure: B

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

What was found

BLEED TRIP OFF LIGHT ILLUMINATED VARIOUS TIMES WITHIN SECONDS. RAN QRH PROCEDURE TO RESET UNTIL IT WOULD NOT RESET ANYMORE, THEN TURNNED LT PACK OFF PER QRH AND CABIN ALT ROSE ABOVE 10. THE WARNING HORN ACTIVATED AND WENT TO MANUAL AC, CABIN ALT AND PRESS CHECKLIST AND INITIATED EMERGENCY DESCENT. PERFORMED T/S AND FOUND LOOSE DUCT CLAMP AT LT WIND TAI DUCT. SECURED CLAM, IAW B737 AMM 36-19-15 & 20-10-44. OPERATIONAL TEST NORMAL, NO LEAKS OR FAULTS FOUND.