<< >> NASA ASRS Report 397850, March 1998

An S80 flight crew levels off at the wrong altitude during a tus arrival. Approach controller catches error and climbs them up to the MVA.

Attributes
ACN	397850
Time
Date	199803
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tus
State Reference	AZ
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tus artcc : zfw
Operator	common carrier : air carrier
Make Model Name	DC-10 30
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	397850
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	397843
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Tus approach, FL100. Tus 071 degree radial, 12 DME. Either misread clearance or misset altitude alert. Flight was VFR. No conflicts or terrain problems. Supplemental information from acn 397843: we thought we were cleared to 10000 ft by tus TRACON. Upon leveloff they informed us that we were below MVA. We climbed back up to 10700 ft per their instructions. WX was clear and there were no conflicts. TRACON informed me by phone later that the first officer had read back 11000 ft. Our mistake.

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Original NASA ASRS Text

Title: AN S80 FLC LEVELS OFF AT THE WRONG ALT DURING A TUS ARR. APCH CTLR CATCHES ERROR AND CLBS THEM UP TO THE MVA.

Narrative: TUS APCH, FL100. TUS 071 DEG RADIAL, 12 DME. EITHER MISREAD CLRNC OR MISSET ALT ALERT. FLT WAS VFR. NO CONFLICTS OR TERRAIN PROBS. SUPPLEMENTAL INFO FROM ACN 397843: WE THOUGHT WE WERE CLRED TO 10000 FT BY TUS TRACON. UPON LEVELOFF THEY INFORMED US THAT WE WERE BELOW MVA. WE CLBED BACK UP TO 10700 FT PER THEIR INSTRUCTIONS. WX WAS CLR AND THERE WERE NO CONFLICTS. TRACON INFORMED ME BY PHONE LATER THAT THE FO HAD READ BACK 11000 FT. OUR MISTAKE.

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.