SDR AALA202003069010

Service difficulty report · Bolt · Boeing 737823

Difficulty date: March 4, 2020
Submitted: March 6, 2020
Operation: Air carrier
Aircraft: N981AN
Make and model: Boeing 737823
Aircraft serial: 29569
Aircraft time: 34,179 hours, 13,642 cycles
Engine: Cfmint CFM567B243
System (JASC): 7520 · Engine Cooling System
Part: Bolt
Condition: Missing
Location: Nr 1 Engine
Stage of operation: CL
How discovered: O
Nature of condition: M, J
Precautionary procedure: A

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

What was found

AIRCRAFT WAS GROUNDED: ENGINE #1 OVERHEAT LIGHT ILLUMINATED DURING CLIMB. FLIGHT CREW REDUCED PWER SETTING ON #1 ENGINE AND NOTED THE LIGHT WENT OUT AT HALF THROTTLE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHX WHERE IT LANDED SAFELY WITH NO FURTHER INCIDENT. THE #1 ENGINE 9TH STAGE INLET TUBE WAS MISSING A BOLT AND 1WAS LOOSE AT THE 5 O'CLOCK POSITION ON THE CASE. INSTALLED MISSING BOLT AND TIGHTED THE LOOSE BOLT PER AMM 75-21-01-401 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.