B747-400 flight crew has a leading edge flap malfunction.

Attributes
ACN	721363
Time
Date	200612
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jnu.airport
State Reference	AK
Altitude	msl single value : 3500
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Controlling Facilities	tower : jnu.tower
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time total : 20 flight time type : 3089
ASRS Report	72136
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : eicas msg other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Conducting operational experience for a new hire first officer while being observed by a check airman. On RNAV approach to runway 8 in jnu. Selected flaps 10 degrees and the leading edge flap transit light illuminated. Trailing edge flaps indicated 10 degrees and overhead annunciator panel indicated all leading edge devices in the full extend position. Reviewed the leading edge flap transit during flap extension checklist. Condition did not match checklist. Performed missed approach to holding where we contacted maintenance and described situation. Normal landing confign could be achieved with the exception of the leading edge flap transit light. Speed tape indications for maneuver speeds; stick shaker; confign limit speeds were erroneous. (Ie; at flaps 10 degrees and 180 KTS speed tape showed operating in the middle of the amber band.) preventive measures: additional information provided in system handbook. A note in QRH procedure to address this situation. Currently no guidance is available.

Original NASA ASRS Text

Title: B747-400 FLT CREW HAS A LEADING EDGE FLAP MALFUNCTION.

Narrative: CONDUCTING OPERATIONAL EXPERIENCE FOR A NEW HIRE FO WHILE BEING OBSERVED BY A CHK AIRMAN. ON RNAV APCH TO RWY 8 IN JNU. SELECTED FLAPS 10 DEGS AND THE LEADING EDGE FLAP TRANSIT LIGHT ILLUMINATED. TRAILING EDGE FLAPS INDICATED 10 DEGS AND OVERHEAD ANNUNCIATOR PANEL INDICATED ALL LEADING EDGE DEVICES IN THE FULL EXTEND POS. REVIEWED THE LEADING EDGE FLAP TRANSIT DURING FLAP EXTENSION CHKLIST. CONDITION DID NOT MATCH CHKLIST. PERFORMED MISSED APCH TO HOLDING WHERE WE CONTACTED MAINT AND DESCRIBED SITUATION. NORMAL LNDG CONFIGN COULD BE ACHIEVED WITH THE EXCEPTION OF THE LEADING EDGE FLAP TRANSIT LIGHT. SPD TAPE INDICATIONS FOR MANEUVER SPDS; STICK SHAKER; CONFIGN LIMIT SPDS WERE ERRONEOUS. (IE; AT FLAPS 10 DEGS AND 180 KTS SPD TAPE SHOWED OPERATING IN THE MIDDLE OF THE AMBER BAND.) PREVENTIVE MEASURES: ADDITIONAL INFO PROVIDED IN SYS HANDBOOK. A NOTE IN QRH PROC TO ADDRESS THIS SITUATION. CURRENTLY NO GUIDANCE IS AVAILABLE.

Data retrieved from NASA's ASRS site as of January 2009 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.