An air carrier B737-200 flight crew has an amber leading edge device in transit light illuminate and...

Attributes
ACN	431452
Time
Date	199903
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lit
State Reference	AR
Altitude	msl bound lower : 35000 msl bound upper : 35300
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 50 flight time total : 2500 flight time type : 50
ASRS Report	431452
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

While at cruise at FL350, our aircraft disengaged the autoplt and locked out the autoplt from being re-engaged. I (PF) started hand flying. We also got a leading edge flaps amber in transit light with a slight roll to the right -- easily countered with aileron/rudder. All gauges for flaps (tef) and leading edge flaps indicated normal, but roll was coming from somewhere. Captain's and copilot's altimeters were noticed to be 200-250 ft different. I flew level flight on the captain's altimeter. ZME queried our altitude which they reported FL353, which was the first officer's altimeter setting. After a couple more checks with center, we decided to fly off the first officer's side. Uneventful rest of the flight. We feel that an electrical hiccup caused the malfunction somehow. Our performance data computer has repeat write- ups in the book. Related? Leading edge flaps lights disengaging the autoplt? Our maintenance coordination did not have an answer. Callback conversation with reporter revealed the following information: the reporter said that the maintenance personnel never told him what caused the leading edge device to deploy or the captain's altimeter to suddenly malfunction. He said that when the flight crew attempted to determine which leading edge device was unlocked the individual device display showed everything was normal. However, the amber leading edge device in transit light remained on and the aircraft still had a roll moment to the right.

Original NASA ASRS Text

Title: AN ACR B737-200 FLC HAS AN AMBER LEADING EDGE DEVICE IN TRANSIT LIGHT ILLUMINATE AND THE ACFT STARTED TO ROLL TO THE R. SEVERAL OTHER, APPARENTLY RELATED, MALFUNCTIONS OCCURRED AT THE SAME TIME, BUT THE FLC WAS ABLE TO CONTINUE TO THEIR DEST.

Narrative: WHILE AT CRUISE AT FL350, OUR ACFT DISENGAGED THE AUTOPLT AND LOCKED OUT THE AUTOPLT FROM BEING RE-ENGAGED. I (PF) STARTED HAND FLYING. WE ALSO GOT A LEADING EDGE FLAPS AMBER IN TRANSIT LIGHT WITH A SLIGHT ROLL TO THE R -- EASILY COUNTERED WITH AILERON/RUDDER. ALL GAUGES FOR FLAPS (TEF) AND LEADING EDGE FLAPS INDICATED NORMAL, BUT ROLL WAS COMING FROM SOMEWHERE. CAPT'S AND COPLT'S ALTIMETERS WERE NOTICED TO BE 200-250 FT DIFFERENT. I FLEW LEVEL FLT ON THE CAPT'S ALTIMETER. ZME QUERIED OUR ALT WHICH THEY RPTED FL353, WHICH WAS THE FO'S ALTIMETER SETTING. AFTER A COUPLE MORE CHKS WITH CTR, WE DECIDED TO FLY OFF THE FO'S SIDE. UNEVENTFUL REST OF THE FLT. WE FEEL THAT AN ELECTRICAL HICCUP CAUSED THE MALFUNCTION SOMEHOW. OUR PERFORMANCE DATA COMPUTER HAS REPEAT WRITE- UPS IN THE BOOK. RELATED? LEADING EDGE FLAPS LIGHTS DISENGAGING THE AUTOPLT? OUR MAINT COORD DID NOT HAVE AN ANSWER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID THAT THE MAINT PERSONNEL NEVER TOLD HIM WHAT CAUSED THE LEADING EDGE DEVICE TO DEPLOY OR THE CAPT'S ALTIMETER TO SUDDENLY MALFUNCTION. HE SAID THAT WHEN THE FLC ATTEMPTED TO DETERMINE WHICH LEADING EDGE DEVICE WAS UNLOCKED THE INDIVIDUAL DEVICE DISPLAY SHOWED EVERYTHING WAS NORMAL. HOWEVER, THE AMBER LEADING EDGE DEVICE IN TRANSIT LIGHT REMAINED ON AND THE ACFT STILL HAD A ROLL MOMENT TO THE R.

Data retrieved from NASA's ASRS site as of July 2007 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.

An air carrier B737-200 flight crew has an amber leading edge device in transit light illuminate and the aircraft started to roll to the right. Several other, apparently related, malfunctions occurred at the same time, but the flight crew was able to continue to their destination.