Air carrier medium large transport altitude deviation overshot during descent for ILS approach to cle because the flight crew had set the altimeters in error.

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Attributes
ACN	199638
Time
Date	199201
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cle
State Reference	OH
Altitude	msl bound lower : 2000 msl bound upper : 3000
Environment
Flight Conditions	Marginal
Light	Night
Aircraft 1
Controlling Facilities	tracon : cle
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach descent other landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 12500 flight time type : 4000
ASRS Report	199638
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation
Independent Detector	atc equipment other atc equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On final approach to runway 23L at cleveland, approach control said they had a low altitude alert. We checked and all 3 altimeters agreed at 3000 ft MSL. Approach then requested we turn off altitude squawk and handed us off to cle tower. We intercepted the GS and landed without further difficulty. Conditions were night VFR, with low scattered clouds and a 6000 ft overcast. While descending on the GS, we discovered all 3 altimeters had been misset: a very low altimeter setting (ATIS information) of 29.34 had been copied onto an ATIS information card as 30.34. We reset the altimeters inside the final fix, and the altimeters showed the correct field elevation after landing. As a suggestion to help prevent similar problems in the future, we feel low altimeter conditions might be noted in the remarks section of the ATIS recording, to help alert crews to double check the information.

Original NASA ASRS Text

Title: ACR MLG ALTDEV OVERSHOT DURING DSCNT FOR ILS APCH TO CLE BECAUSE THE FLC HAD SET THE ALTIMETERS IN ERROR.

Narrative: ON FINAL APCH TO RWY 23L AT CLEVELAND, APCH CTL SAID THEY HAD A LOW ALT ALERT. WE CHKED AND ALL 3 ALTIMETERS AGREED AT 3000 FT MSL. APCH THEN REQUESTED WE TURN OFF ALT SQUAWK AND HANDED US OFF TO CLE TWR. WE INTERCEPTED THE GS AND LANDED WITHOUT FURTHER DIFFICULTY. CONDITIONS WERE NIGHT VFR, WITH LOW SCATTERED CLOUDS AND A 6000 FT OVCST. WHILE DSNDING ON THE GS, WE DISCOVERED ALL 3 ALTIMETERS HAD BEEN MISSET: A VERY LOW ALTIMETER SETTING (ATIS INFO) OF 29.34 HAD BEEN COPIED ONTO AN ATIS INFO CARD AS 30.34. WE RESET THE ALTIMETERS INSIDE THE FINAL FIX, AND THE ALTIMETERS SHOWED THE CORRECT FIELD ELEVATION AFTER LNDG. AS A SUGGESTION TO HELP PREVENT SIMILAR PROBLEMS IN THE FUTURE, WE FEEL LOW ALTIMETER CONDITIONS MIGHT BE NOTED IN THE REMARKS SECTION OF THE ATIS RECORDING, TO HELP ALERT CREWS TO DOUBLE CHK THE INFO.

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.