Altitude deviation altitude undershot when altitude crossing restriction not made.

Attributes
ACN	160314
Time
Date	199010
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	msl bound lower : 10000 msl bound upper : 17000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other
Route In Use	arrival other arrival star : star enroute airway : zkc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : cfi pilot : commercial
Experience	flight time last 90 days : 185 flight time total : 15200 flight time type : 7900
ASRS Report	160314
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 2000
ASRS Report	160323
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Scheduled airlines flight from msp to stl (routing: msp-rst-alo-J233 to colie, atlis 5 arrival to stl). At cruise altitude prior to the quincy VOR, flight was given clearance to cross 30 mi northwest of the stl VOR at 10000' and 250 KTS. We began a slow descent to comply with this clearance. Later flight received a new clearance to maintain 17000', which we read back and which was acknowledged. Approaching 30 DME northwest of the stl VOR ZKC asked us our altitude. We replied 17000'. Center told us that we had been cleared to cross 30 DME northwest of the stl VOR at and maintain 10000' and 250 KTS. We acknowledged receiving that original clearance and advised the center that we had later received an amended clearance to descend to and maintain 17000', which we complied with. The controller advised us that he wasn't aware of our revised altitude clearance. No further conversations occurred re: the above crossing altitude instructions.

Original NASA ASRS Text

Title: ALT DEVIATION ALT UNDERSHOT WHEN ALT CROSSING RESTRICTION NOT MADE.

Narrative: SCHEDULED AIRLINES FLT FROM MSP TO STL (RTING: MSP-RST-ALO-J233 TO COLIE, ATLIS 5 ARR TO STL). AT CRUISE ALT PRIOR TO THE QUINCY VOR, FLT WAS GIVEN CLRNC TO CROSS 30 MI NW OF THE STL VOR AT 10000' AND 250 KTS. WE BEGAN A SLOW DSNT TO COMPLY WITH THIS CLRNC. LATER FLT RECEIVED A NEW CLRNC TO MAINTAIN 17000', WHICH WE READ BACK AND WHICH WAS ACKNOWLEDGED. APCHING 30 DME NW OF THE STL VOR ZKC ASKED US OUR ALT. WE REPLIED 17000'. CENTER TOLD US THAT WE HAD BEEN CLRED TO CROSS 30 DME NW OF THE STL VOR AT AND MAINTAIN 10000' AND 250 KTS. WE ACKNOWLEDGED RECEIVING THAT ORIGINAL CLRNC AND ADVISED THE CENTER THAT WE HAD LATER RECEIVED AN AMENDED CLRNC TO DSND TO AND MAINTAIN 17000', WHICH WE COMPLIED WITH. THE CTLR ADVISED US THAT HE WASN'T AWARE OF OUR REVISED ALT CLRNC. NO FURTHER CONVERSATIONS OCCURRED RE: THE ABOVE XING ALT INSTRUCTIONS.

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.