B737 first officer reported the leading edge flap sensing system caused a problem while on taxi out ...

Attributes
ACN	1394609
Time
Date	201610
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Takeoff Taxi
Flight Plan	IFR
Component
Aircraft Component	Flap/Slat Indication
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 249
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural MEL

Narrative:

During taxi out we saw an amber leading edge (le) flaps transit light illuminate. It alternated with the le flaps ext (green) light. We returned to the gate to have maintenance have a look at it. They MEL'd the item under MEL 27-04-xx. The mechanic removed the bulbs of the le flaps transit light and ext lights according to the MEL instructions. During takeoff roll; after V1; we heard the takeoff warning horn go off for a split second. We continued the takeoff. No other problems after this incident. The captain checked it on the taxi in to the gate. I am writing this as soon as possible to inform that there is a possibility that the takeoff warning horn will come on momentarily when you have MEL 27-04-xx when the takeoff flaps are in position 1. This might be helpful to be included in the notes of the MEL.

Original NASA ASRS Text

Title: B737 First Officer reported the leading edge flap sensing system caused a problem while on taxi out and deploying the flaps. Crew returned to the gate for a maintenance inspection; the issue was MEL'd and the flight departed normally save a momentary take off warning horn during takeoff roll.

Narrative: During taxi out we saw an amber Leading Edge (LE) Flaps Transit light illuminate. It alternated with the LE Flaps EXT (green) light. We returned to the gate to have Maintenance have a look at it. They MEL'd the item under MEL 27-04-XX. The Mechanic removed the bulbs of the LE Flaps Transit light and EXT lights according to the MEL instructions. During takeoff roll; after V1; we heard the Takeoff Warning horn go off for a split second. We continued the takeoff. No other problems after this incident. The Captain checked it on the taxi in to the gate. I am writing this ASAP to inform that there is a possibility that the Takeoff Warning horn will come on momentarily when you have MEL 27-04-XX when the takeoff flaps are in position 1. This might be helpful to be included in the notes of the MEL.

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.

B737 first officer reported the leading edge flap sensing system caused a problem while on taxi out and deploying the flaps. Crew returned to the gate for a maintenance inspection; the issue was MEL'd and the flight departed normally save a momentary take off warning horn during takeoff roll.