Narrative:

Upon arriving to airplane I was briefed by dead heading (DH) captain; who was to DH on our flight and fly next leg from our destination. He received debrief from previous flight captain about repeat write up on this airplane; flap transit light. He briefed me that the light came on again and he wrote up airplane. In accordance with with QRH irregular; he flew F15 approach and landing. I received debrief from maintenance (mx) lead who told me they meled the light and disabled the light. They had done tests on the ground and the le flaps and slats as well as te flaps all extend and retract normally; but the flap transit light comes on in error. Mx confirmed with me that the light was disabled. I read the MEL with first officer (first officer); which restricted the flight to 300 knots/.65 mach enroute; with no other restrictions. I called dispatcher and together over phone she re-read the entire MEL; and gave me assurances that there were no other restrictions. I elected to accept the airplane and we departed a few minutes after scheduled departure. During the flight my first officer and I re-read the MEL and afterwards I contacted maintenance control to confirm with them that the le flap transit would not come on and no other accompanying warnings. Mx confirmed. On final; aircraft configured normally flaps 30 final speed achieved by 1500 feet AGL. Somewhere below 1000 and 500 feet (estimate 600) the le flap transit light came on again and shortly afterwards an aural warning 'airspeed low'. We had already confirmed that all flaps and slats were deployed and visually confirmed; and the airplane was stable; so after a very brief discussion with first officer; we elected to continue approach and landing. I increased target speed to match the F15 speed; approximately 160 knots; and the aural warning went out. Normal speeds for F30 were 143/target 148. Normal flare to landing; taxi into gate. After landing I elected to keep flaps at 30 and inspect visually with next captain and first officer. We confirm that all flaps and slats did in fact deploy normally. The first officer was once again reviewing the MEL; and noticed that under operations placard; it said cockpit circuit breaker (circuit breaker) pulled and safe tied; the following may be pulled: stall warning asym mode. He confirmed that this circuit breaker had not been pulled and safe tied. I called mx and we discussed this issue and we suggested this may have been the reason why the le flap transit warnings came on. After further discussions with mc and ensuring contract mx was on its way; I traded phone numbers with captain who was now captain of record; and asked him to call me; which he did a few hours later. As is turned out after this circuit breaker was pulled. I did not hear back again from him; so I assume he did not get the spurious warning that we had. I suspect on the last page of the MEL that mx pulled the light bulb for le flap ext; but did not pull circuit breaker; and did not pull light bulb nor circuit breaker for le flap transit in error.

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Original NASA ASRS Text

Title: A B737 LE FLAP TRANSIT light falsely alerted and was subsequently MELed. The flight departed with the restrictions applied but the light alerted again on final along with an AIRSPEED LOW alert. The crew discovered the flap alert was indeed false; and the STALL WARNING ASYM MODE circuit breaker had not been pulled.

Narrative: Upon arriving to airplane I was briefed by Dead Heading (DH) Captain; who was to DH on our flight and fly next leg from our destination. He received debrief from previous flight Captain about repeat write up on this airplane; FLAP TRANSIT LIGHT. He briefed me that the light came on again and he wrote up airplane. IAW with QRH irregular; he flew F15 approach and landing. I received debrief from Maintenance (MX) lead who told me they MELed the light and disabled the light. They had done tests on the ground and the LE FLAPS and SLATS as well as TE FLAPS all extend and retract normally; but the FLAP TRANSIT LIGHT comes on in error. MX confirmed with me that the light was disabled. I read the MEL with First Officer (FO); which restricted the flight to 300 knots/.65 mach enroute; with no other restrictions. I called Dispatcher and together over phone she re-read the entire MEL; and gave me assurances that there were no other restrictions. I elected to accept the airplane and we departed a few minutes after scheduled departure. During the flight my FO and I re-read the MEL and afterwards I contacted Maintenance Control to confirm with them that the LE FLAP TRANSIT would not come on and no other accompanying warnings. MX confirmed. On final; aircraft configured normally Flaps 30 final speed achieved by 1500 feet AGL. Somewhere below 1000 and 500 feet (estimate 600) the LE FLAP TRANSIT light came on again and shortly afterwards an aural warning 'airspeed low'. We had already confirmed that all flaps and slats were deployed and visually confirmed; and the airplane was stable; so after a very brief discussion with FO; we elected to continue approach and landing. I increased target speed to match the F15 speed; approximately 160 knots; and the aural warning went out. Normal speeds for F30 were 143/target 148. Normal flare to landing; taxi into gate. After landing I elected to keep Flaps at 30 and inspect visually with next Captain and FO. We confirm that all flaps and slats did in fact deploy normally. The FO was once again reviewing the MEL; and noticed that under OPS PLACARD; it said cockpit Circuit Breaker (CB) pulled and safe tied; the following MAY be pulled: STALL WARNING ASYM MODE. He confirmed that this CB had NOT been pulled and safe tied. I called MX and we discussed this issue and we suggested this may have been the reason why the LE FLAP TRANSIT warnings came on. After further discussions with MC and ensuring contract MX was on its way; I traded phone numbers with Captain who was now Captain of record; and asked him to call me; which he did a few hours later. As is turned out after this CB was pulled. I did not hear back again from him; so I assume he did not get the spurious warning that we had. I suspect on the last page of the MEL that MX pulled the light bulb for LE FLAP EXT; but did not pull CB; and did not pull light bulb nor CB for LE FLAP TRANSIT in error.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.