B767-er had planned approach to runway 25L. Was vectored to runway 7R and cleared to descend to 900 meters. Failed to set current altimeter and descended to 600 meters or 2600 ft. Controller questioned altitude after the error had been noted.

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Attributes
ACN	361467
Time
Date	199702
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sre
State Reference	FO
Altitude	msl bound lower : 2600 msl bound upper : 3000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mdw
Operator	common carrier : air carrier
Make Model Name	B767-200
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 190 flight time total : 24000 flight time type : 4000
ASRS Report	361467
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 75 flight time total : 10000 flight time type : 1800
ASRS Report	361341
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : far non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were descending from the ivanouskoye NDB toward the ad beacon while on, what we thought to be, the UM25B approach. The descent and approach checklist had been accomplished down to 'altimeters to go.' while approaching the beacon the controller cleared us to descend to '900 meters, (2960 ft) and turn left to 300 degrees (EST) for vectors to runway 7R. As we were prepared for runway 25L, there was a great deal to be done and we passed through the transition level without resetting our altimeters to QFE 0978 hp. About this time (we were still descending and the controller gave us a new vector and updated the altimeter to 0980 hp). At this time we realized we had not reset our altimeters and immediately did so while simultaneously initiating a climb back to 2960 ft from approximately 2600 ft. Shortly thereafter (5 seconds or so) the controller asked our altitude and stated we indicated low.

Original NASA ASRS Text

Title: B767-ER HAD PLANNED APCH TO RWY 25L. WAS VECTORED TO RWY 7R AND CLRED TO DSND TO 900 METERS. FAILED TO SET CURRENT ALTIMETER AND DSNDED TO 600 METERS OR 2600 FT. CTLR QUESTIONED ALT AFTER THE ERROR HAD BEEN NOTED.

Narrative: WE WERE DSNDING FROM THE IVANOUSKOYE NDB TOWARD THE AD BEACON WHILE ON, WHAT WE THOUGHT TO BE, THE UM25B APCH. THE DSCNT AND APCH CHKLIST HAD BEEN ACCOMPLISHED DOWN TO 'ALTIMETERS TO GO.' WHILE APCHING THE BEACON THE CTLR CLRED US TO DSND TO '900 METERS, (2960 FT) AND TURN L TO 300 DEGS (EST) FOR VECTORS TO RWY 7R. AS WE WERE PREPARED FOR RWY 25L, THERE WAS A GREAT DEAL TO BE DONE AND WE PASSED THROUGH THE TRANSITION LEVEL WITHOUT RESETTING OUR ALTIMETERS TO QFE 0978 HP. ABOUT THIS TIME (WE WERE STILL DSNDING AND THE CTLR GAVE US A NEW VECTOR AND UPDATED THE ALTIMETER TO 0980 HP). AT THIS TIME WE REALIZED WE HAD NOT RESET OUR ALTIMETERS AND IMMEDIATELY DID SO WHILE SIMULTANEOUSLY INITIATING A CLB BACK TO 2960 FT FROM APPROX 2600 FT. SHORTLY THEREAFTER (5 SECONDS OR SO) THE CTLR ASKED OUR ALT AND STATED WE INDICATED LOW.

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.