<< >> NASA ASRS Report 782048, April 2008

The first officer's airspeed indicator failed on a B767. The alternate air data computer was selected to resolve the problem; but this rendered the aircraft illegal for their altitude in rvsm airspace.

Attributes
ACN	782048
Time
Date	200804
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zdc.artcc
State Reference	DC
Altitude	msl single value : 37000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 6000
ASRS Report	782048
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 210 flight time total : 10000 flight time type : 1200
ASRS Report	782366
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : overcame equipment problem
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

During climb; the captain's and first officer's reading (map) lights became inoperative. Shortly thereafter; the first officer's airspeed indicator failed. Control was xferred to the captain. The airspeed indicator problem was resolved by selecting alternate air data computer. The procedure referenced another document to determine if rvsm was appropriate. With the combination of struggling with no lights and working with ATC; we did not reference the other material until we were in cruise. By the time we researched and discovered we were not rvsm capable; ATC had given us a lower altitude and we descended out of rvsm. There were no conflicts with traffic and the item was entered in the maintenance logbook. The captain's and first officer's altimeters worked normally with no errors throughout the episode.

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Original NASA ASRS Text

Title: THE FO'S AIRSPEED INDICATOR FAILED ON A B767. THE ALTERNATE AIR DATA COMPUTER WAS SELECTED TO RESOLVE THE PROBLEM; BUT THIS RENDERED THE ACFT ILLEGAL FOR THEIR ALT IN RVSM AIRSPACE.

Narrative: DURING CLB; THE CAPT'S AND FO'S READING (MAP) LIGHTS BECAME INOP. SHORTLY THEREAFTER; THE FO'S AIRSPD INDICATOR FAILED. CTL WAS XFERRED TO THE CAPT. THE AIRSPD INDICATOR PROB WAS RESOLVED BY SELECTING ALTERNATE ADC. THE PROC REFED ANOTHER DOCUMENT TO DETERMINE IF RVSM WAS APPROPRIATE. WITH THE COMBINATION OF STRUGGLING WITH NO LIGHTS AND WORKING WITH ATC; WE DID NOT REF THE OTHER MATERIAL UNTIL WE WERE IN CRUISE. BY THE TIME WE RESEARCHED AND DISCOVERED WE WERE NOT RVSM CAPABLE; ATC HAD GIVEN US A LOWER ALT AND WE DSNDED OUT OF RVSM. THERE WERE NO CONFLICTS WITH TFC AND THE ITEM WAS ENTERED IN THE MAINT LOGBOOK. THE CAPT'S AND FO'S ALTIMETERS WORKED NORMALLY WITH NO ERRORS THROUGHOUT THE EPISODE.

Data retrieved from NASA's ASRS site as of May 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.