Service difficulty report · Smoke Detector · Boeing 767281

Difficulty date
May 16, 2023
Submitted
May 18, 2023
Operation
Air carrier
Aircraft
N797AX
Make and model
Boeing 767281
Aircraft serial
23147
Aircraft time
72,356 hours, 49,257 cycles
Part
Smoke Detector
Part number
2156204A
Part serial
1431
Condition
Defective
Location
Zone 100
Stage of operation
DE
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

DURING DESCENT THE FWD EQPT SMOKE EICAS MESSAGE AND EQUIPMENT COOLING SMOKE ANNUNCIATOR LIGHT ILLUMINATED. FOLLOWED QRH BOTH LIGHTS STAYED ILLUMINATED. CONTACTED ATC AND DECLARED AN EMERGENCY AND REQUESTED CLEARANCE DIRECT TO KCVG. WE WERE CLEARED DIRECT TO THE AIRPORT AND TO DESCEND TO 4,000. SUBSEQUENTLY REQUESTED TO LAND 36R. 36R ALLOWED US TO PROCEED DIRECTLY TO THE AIRPORT FOR A STRAIGHT IN APPROACH. AFTER ACCOMPLISHING ALL THE CHECKLIST ITEMS IN THE QRH, THE “FORWARD EQPT SMOKE” AND OVERHEAD “SMOKE” LIGHTS REMAINED ILLUMINATED. WE DID NOT HAVE SMOKE IN THE COCKPIT! WE FLEW A VISUAL APPROACH TO RUNWAY 36R. AFTER LANDING, WE TURNED OFF THE RUNWAY AT T6 AND STOPPED. BECAUSE BOTH SMOKE LIGHTS REMAINED ON, WE ELECTED TO POWER DOWN THE AIRCRAFT AND BEGIN EVACUATION. AIRCRAFT GROUNDED BY MAINTENANCE. MAINTENANCE TROUBLE SHOT SYSTEM. DURING T/S FOUND THAT EQUIP SMOKE LIGHT EXTINGUISHED AND MESSAGE CLEARED. FOUND THAT EQUP COOLING TEST SMOKE LIGHT & EICAS MSG. WOULD NOT SHOW. R/R EQUIPMENT SMOKE DETECTOR IAW AMM 21-58-19. SYS GROUND OPS CHECK NORMAL. PER MX CONTROL REQUEST R/R MISC TEST PNL IAW WDM 31-51-41. ALL TESTS OPS NOORMAL. NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.