An air carrier large transport crew admits that they climbed through their assigned altitude. Error admitted. Aircraft equipment problem faulty omega navigation requiring both pilot's attention. Possible aircraft equipment problem altitude alert did not sound or volume too low.

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Attributes
ACN	360643
Time
Date	199702
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : rbv
State Reference	NJ
Altitude	msl bound lower : 17000 msl bound upper : 17700
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 140 flight time total : 11700 flight time type : 2000
ASRS Report	360643
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time total : 3500
ASRS Report	360030
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : far non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Crew cleared to climb to 17000 ft. We both went heads down, captain to tune VOR and set radial, first officer to omega. We both missed the 1000 ft to go callout and did not hear the chime, volume set too low. We both heard the 500 ft above alert altitude chime (probably due to reduced workload). We stopped the climb at 700 ft above target altitude. Meanwhile, ATC cleared us to continue the climb to FL230. Supplemental information from acn 360030: captain and first officer working on navigation (erroneous omega). Flight engineer running his panel. None of crew heard first chime on altitude alert, heard second chime thinking it was the first.

Original NASA ASRS Text

Title: AN ACR LGT CREW ADMITS THAT THEY CLBED THROUGH THEIR ASSIGNED ALT. ERROR ADMITTED. ACFT EQUIP PROB FAULTY OMEGA NAV REQUIRING BOTH PLT'S ATTN. POSSIBLE ACFT EQUIP PROB ALT ALERT DID NOT SOUND OR VOLUME TOO LOW.

Narrative: CREW CLRED TO CLB TO 17000 FT. WE BOTH WENT HEADS DOWN, CAPT TO TUNE VOR AND SET RADIAL, FO TO OMEGA. WE BOTH MISSED THE 1000 FT TO GO CALLOUT AND DID NOT HEAR THE CHIME, VOLUME SET TOO LOW. WE BOTH HEARD THE 500 FT ABOVE ALERT ALT CHIME (PROBABLY DUE TO REDUCED WORKLOAD). WE STOPPED THE CLB AT 700 FT ABOVE TARGET ALT. MEANWHILE, ATC CLRED US TO CONTINUE THE CLB TO FL230. SUPPLEMENTAL INFO FROM ACN 360030: CAPT AND FO WORKING ON NAV (ERRONEOUS OMEGA). FE RUNNING HIS PANEL. NONE OF CREW HEARD FIRST CHIME ON ALT ALERT, HEARD SECOND CHIME THINKING IT WAS THE FIRST.

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.