<< >> NASA ASRS Report 233902, February 1993

A cpr light transport overshot its altitude on descent. The pilots had misset their altimeters by 1 inch of mercury.

Attributes
ACN	233902
Time
Date	199302
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ign
State Reference	NY
Altitude	msl bound lower : 10400 msl bound upper : 12000
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 140 flight time total : 4100 flight time type : 100
ASRS Report	233902
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : became reoriented other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Descending out of FL190 to 11000 ft. Co-captain in right seat. Went off center frequency to get lga ATIS. Upon reaching 11000 ft, center asked to confirm altitude. I replied level 11000 ft. Center came back 'you are 600 ft low, climb back to 11000 ft.' I replied, 'we are level 11000 ft.' center said, 'climb back to 12000 ft, altimeter 29.31.' my altitude was 30.31. Both of us were very tired and had not gotten a chance to eat yet. I know myself. I do not operate very well on empty. However, as captain I should have had my co-captain complete the landing preliminary checks before he went off center to obtain the ATIS.

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Original NASA ASRS Text

Title: A CPR LTT OVERSHOT ITS ALT ON DSCNT. THE PLTS HAD MISSET THEIR ALTIMETERS BY 1 INCH OF MERCURY.

Narrative: DSNDING OUT OF FL190 TO 11000 FT. CO-CAPT IN R SEAT. WENT OFF CTR FREQ TO GET LGA ATIS. UPON REACHING 11000 FT, CTR ASKED TO CONFIRM ALT. I REPLIED LEVEL 11000 FT. CTR CAME BACK 'YOU ARE 600 FT LOW, CLB BACK TO 11000 FT.' I REPLIED, 'WE ARE LEVEL 11000 FT.' CTR SAID, 'CLB BACK TO 12000 FT, ALTIMETER 29.31.' MY ALT WAS 30.31. BOTH OF US WERE VERY TIRED AND HAD NOT GOTTEN A CHANCE TO EAT YET. I KNOW MYSELF. I DO NOT OPERATE VERY WELL ON EMPTY. HOWEVER, AS CAPT I SHOULD HAVE HAD MY CO-CAPT COMPLETE THE LNDG PRELIMINARY CHKS BEFORE HE WENT OFF CTR TO OBTAIN THE ATIS.

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.