Altitude deviation.

Attributes
ACN	201766
Time
Date	199202
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ape
State Reference	OH
Altitude	msl bound lower : 22600 msl bound upper : 23000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 150
ASRS Report	201766
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : undershoot non adherence : clearance non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : became reoriented other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Here is one for you. Our airline just bought adv lgts from defunct air carrier. Unknown to us, other air carrier had some policy which had the captain's and first officer's altimeters reading zero on landing. To accommodate the FMC's in the aircraft they wired both air data computer's to the standby altimeter (strange, but true). On departure from dtw we were given a rerte. As I copied, the captain entered it into the FMC. We forgot to reset the standby altimeter out of FL180 and the aircraft leveled 400 ft low. Center noticed this and asked us. Quite a system surprise. I have heard other airlines having this bizarre system ('0' setting on landing).

Original NASA ASRS Text

Title: ALTDEV.

Narrative: HERE IS ONE FOR YOU. OUR AIRLINE JUST BOUGHT ADV LGTS FROM DEFUNCT ACR. UNKNOWN TO US, OTHER ACR HAD SOME POLICY WHICH HAD THE CAPT'S AND FO'S ALTIMETERS READING ZERO ON LNDG. TO ACCOMMODATE THE FMC'S IN THE ACFT THEY WIRED BOTH ADC'S TO THE STANDBY ALTIMETER (STRANGE, BUT TRUE). ON DEP FROM DTW WE WERE GIVEN A RERTE. AS I COPIED, THE CAPT ENTERED IT INTO THE FMC. WE FORGOT TO RESET THE STANDBY ALTIMETER OUT OF FL180 AND THE ACFT LEVELED 400 FT LOW. CTR NOTICED THIS AND ASKED US. QUITE A SYS SURPRISE. I HAVE HEARD OTHER AIRLINES HAVING THIS BIZARRE SYS ('0' SETTING ON LNDG).

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.