Return land of a cargo MD11 mandated when the flight crew experiences a loss of reliability of their instrument readings after departure from anc, ak.

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Attributes
ACN	561056
Time
Date	200209
Day	Mon
Local Time Of Day	1201 To 1800
Place
State Reference	AK
Altitude	msl bound lower : 4000 msl bound upper : 5000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a11.tracon
Operator	common carrier : air carrier
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 10000 flight time type : 400
ASRS Report	561056
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : inst panel other flight crewa other flight crewb
Resolutory Action	flight crew : landed in emergency condition flight crew : exited adverse environment flight crew : diverted to another airport flight crew : declared emergency
Consequence	faa : reviewed incident with flight crew other other
Supplementary
Problem Areas	Weather Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

First officer lost reliable instrument readings. Not knowing if the capts had failed deviated from altitude to remain VMC, 5000 ft to 4000 ft. Discovered first officer readings were unreliable and, suspecting that captain's were not doing that great, declared emergency and landed back at anchorage. Talked with departure control on landing and was informed there was no problem.

Original NASA ASRS Text

Title: RETURN LAND OF A CARGO MD11 MANDATED WHEN THE FLC EXPERIENCES A LOSS OF RELIABILITY OF THEIR INST READINGS AFTER DEP FROM ANC, AK.

Narrative: FO LOST RELIABLE INST READINGS. NOT KNOWING IF THE CAPTS HAD FAILED DEVIATED FROM ALT TO REMAIN VMC, 5000 FT TO 4000 FT. DISCOVERED FO READINGS WERE UNRELIABLE AND, SUSPECTING THAT CAPT'S WERE NOT DOING THAT GREAT, DECLARED EMER AND LANDED BACK AT ANCHORAGE. TALKED WITH DEP CTL ON LNDG AND WAS INFORMED THERE WAS NO PROB.

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.