Flight crew of large transport had altitude deviation on descent, 10,000 for 11,000.

Attributes
ACN	127182
Time
Date	198911
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : den
State Reference	CO
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdv tracon : den
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : commercial pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4000
ASRS Report	127182
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : flight engineer
Experience	flight time total : 16896
ASRS Report	127181
Events
Anomaly	altitude deviation : overshoot altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Approaching den, we were instructed to turn to a heading of 300 degree after crossing kiowa due to den VOR being out of service. We were later cleared to cross kiowa at 17,000 and descend and maintain 10,000'. At approximately 8-10 mi from den, while at 10,200 and descending, the controller said 'maintain 11,000'.' we responded that we were leveling at 10,000' but would climb to 11,000. Controller responded 'maintain 11,000, traffic at 12 O'clock, 3 mi, level at 10,000.' we confirmed we had traffic in sight. No conflict arose.

Original NASA ASRS Text

Title: FLT CREW OF LGT HAD ALT DEVIATION ON DESCENT, 10,000 FOR 11,000.

Narrative: APCHING DEN, WE WERE INSTRUCTED TO TURN TO A HDG OF 300 DEG AFTER XING KIOWA DUE TO DEN VOR BEING OUT OF SERVICE. WE WERE LATER CLRED TO CROSS KIOWA AT 17,000 AND DSND AND MAINTAIN 10,000'. AT APPROX 8-10 MI FROM DEN, WHILE AT 10,200 AND DESCENDING, THE CTLR SAID 'MAINTAIN 11,000'.' WE RESPONDED THAT WE WERE LEVELING AT 10,000' BUT WOULD CLIMB TO 11,000. CTLR RESPONDED 'MAINTAIN 11,000, TFC AT 12 O'CLOCK, 3 MI, LEVEL AT 10,000.' WE CONFIRMED WE HAD TFC IN SIGHT. NO CONFLICT AROSE.

Data retrieved from NASA's ASRS site as of August 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.