Service difficulty report · Fire Loop · Lear 60LEAR

Difficulty date
November 13, 2018
Submitted
November 30, 2018
Operation
Air carrier
Aircraft
N821DF
Make and model
Lear 60LEAR
Aircraft serial
60042
Aircraft time
7,248 hours, 5,376 cycles
Engine
Pwa PW305A
Engine time
7,198 hours, 5,338 cycles
Part
Fire Loop
Condition
Out Of Position
Location
Rt Engine
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
E, A

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

What was found

CREW REPORTED : APPROXIMATELY 10 MIN AFTER DEPARTURE FROM KJZI EN-ROUTE FOR KSUA CLIMBING TO OUR FILED ALT OF FL380 WITH FULL ANTI-ICE ON, WHEN AT FL340 THE RIGHT ENGINE T-HANDLE FIRE WARNING SYSTEM FLASHED MOMENTARILY. BOTH CREW MEMBERS REACTED TO THE FIRE WARNING AND EXECUTED THE MEMORY ITEMS AND BEFORE THE THE FIRE SUPPRESSION SYSTEM WAS ACTIVATED THE FLICKERING WARNING SYSTEM STOPPED. THE CREW CONTINUED THE ENGINE FIRE CHECKLIST AND SECURED THE RIGHT ENGINE AS A PRECAUTION. THE CREW ASKED ATC FOR A LOWER ALTITUDE AND INSTRUCTION TO DIVERT AND LAND. THERE WAS NO SMOKE IN THE CABIN OR ANY ABNORMAL SMELLS THE CREW DID NOT DECLARE AN EMERGENCY FOR THE REMAINING FLIGHT. AFTER TALKING WITH MX VIA ARINC IT WAS SUSPECTED THERE WAS A DEFECTIVE FIRE LOOP. THEY OPTED TO RESTART THE ENGINE FOR THE LANDING. THE LANDING WAS NORMAL AND NO FIRE INDICATIONS. MAINTENANCE TROUBLESHOOTING DISCOVERED NO FIRE DAMAGE. THEY DID FIND SEVERAL LOOSE BLEED-AIR CLAMPS ON THE RIGHT ENGINE. THE FIRE DETECT LOOP WAS FOUND TOUCHING METAL. OPS CHECKS WERE SATISFACTORY. NOTE: THE RH ENGINE HAD BEEN REINSTALLED BY A MAJOR MRO AFTER REPAIRS ABOUT 20 FLIGHT HOURS PRIOR TO THIS EVENT.