ATC approach controller advised the flight crew of an medium large transport that they were not indicating assigned altitude by 500 ft too low. Flight crew's 3 altimeters all showed the correct assigned altitude and set to the current altimeter setting.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	338100
Time
Date	199606
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : scy airport : dfw
State Reference	TX
Altitude	msl bound lower : 10500 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw tower : syr
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 40 flight time total : 7500 flight time type : 4035
ASRS Report	338100
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During our arrival into dfw, we had just leveled at 11000 ft on altitude setting 29.86 (the current altitude setting). The approach controller reported that our beacon read 10500 ft MSL, and we verified that we were level at 11000 ft MSL. At no time had we deviated from our assigned altitude. We informed him of that and continued with an uneventful flight. We are sure it is his equipment problem, because all 3 of our altimeters read properly.

Original NASA ASRS Text

Title: ATC APCH CTLR ADVISED THE FLC OF AN MLG THAT THEY WERE NOT INDICATING ASSIGNED ALT BY 500 FT TOO LOW. FLC'S 3 ALTIMETERS ALL SHOWED THE CORRECT ASSIGNED ALT AND SET TO THE CURRENT ALTIMETER SETTING.

Narrative: DURING OUR ARR INTO DFW, WE HAD JUST LEVELED AT 11000 FT ON ALT SETTING 29.86 (THE CURRENT ALT SETTING). THE APCH CTLR RPTED THAT OUR BEACON READ 10500 FT MSL, AND WE VERIFIED THAT WE WERE LEVEL AT 11000 FT MSL. AT NO TIME HAD WE DEVIATED FROM OUR ASSIGNED ALT. WE INFORMED HIM OF THAT AND CONTINUED WITH AN UNEVENTFUL FLT. WE ARE SURE IT IS HIS EQUIP PROB, BECAUSE ALL 3 OF OUR ALTIMETERS READ PROPERLY.

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.