Mdt crew did not comply with crossing restr.

Attributes
ACN	442330
Time
Date	199907
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : sbi.vor
State Reference	TX
Altitude	msl single value : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp pilot : commercial
Experience	flight time last 90 days : 140 flight time total : 3800 flight time type : 2200
ASRS Report	442330
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Was approximately 50 DME east of sbi VOR, center told me to cross 20 mi west of sbi at 8000 ft. I started the descent at 40 DME east of sbi expecting to make the restr. At 10 DME west of sbi center asked if I was going to make the restr. At that point I realized my error. Even though I dialed 8000 ft in the autoplt, I was calculating for a 10000 ft altitude. I missed the restr by about 4 mi. I believe my mistake to be the result of fatigue. The day before was a long day with thunderstorms and WX delays. The rest period was reduced to 8 hours with a long drive to and from the hotel. My estimated actual sleep time was 5 hours.

Original NASA ASRS Text

Title: MDT CREW DID NOT COMPLY WITH XING RESTR.

Narrative: WAS APPROX 50 DME E OF SBI VOR, CTR TOLD ME TO CROSS 20 MI W OF SBI AT 8000 FT. I STARTED THE DSCNT AT 40 DME E OF SBI EXPECTING TO MAKE THE RESTR. AT 10 DME W OF SBI CTR ASKED IF I WAS GOING TO MAKE THE RESTR. AT THAT POINT I REALIZED MY ERROR. EVEN THOUGH I DIALED 8000 FT IN THE AUTOPLT, I WAS CALCULATING FOR A 10000 FT ALT. I MISSED THE RESTR BY ABOUT 4 MI. I BELIEVE MY MISTAKE TO BE THE RESULT OF FATIGUE. THE DAY BEFORE WAS A LONG DAY WITH TSTMS AND WX DELAYS. THE REST PERIOD WAS REDUCED TO 8 HRS WITH A LONG DRIVE TO AND FROM THE HOTEL. MY ESTIMATED ACTUAL SLEEP TIME WAS 5 HRS.

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.