Altitude deviation. Altitude crossing restriction not made.

Attributes
ACN	181971
Time
Date	199106
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dag
State Reference	CA
Altitude	msl bound lower : 24000 msl bound upper : 25000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 15700 flight time type : 11000
ASRS Report	181971
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

While cruising at FL280, descent to a crossing restriction 10 mi northeast of dag VORTAC was initiated late. The restriction was made a few mi past the 10 mi restriction. I believe that crew fatigue was a prime factor in this incident. We were on the third day of a 4 day trip pairing, which flew 27 flts in a 4 day period. Flight time scheduled at 28 hours and 15 mins. All but 6 of these round trips were in and out of 'kamikaze alley' (aka, bur). Crew rest was approximately 14 hours between each of these days. There is such a let down when not dodging aircraft in and out of bur that one tends to relax and not pay as much attention as needed at cruise flight. We also noted a near miss of 2 light aircraft in the bur area on the previous leg. Also the loud vol of the TCAS system constantly yelling at one contributes greatly to overall cockpit fatigue.

Original NASA ASRS Text

Title: ALT DEVIATION. ALT CROSSING RESTRICTION NOT MADE.

Narrative: WHILE CRUISING AT FL280, DSNT TO A XING RESTRICTION 10 MI NE OF DAG VORTAC WAS INITIATED LATE. THE RESTRICTION WAS MADE A FEW MI PAST THE 10 MI RESTRICTION. I BELIEVE THAT CREW FATIGUE WAS A PRIME FACTOR IN THIS INCIDENT. WE WERE ON THE THIRD DAY OF A 4 DAY TRIP PAIRING, WHICH FLEW 27 FLTS IN A 4 DAY PERIOD. FLT TIME SCHEDULED AT 28 HRS AND 15 MINS. ALL BUT 6 OF THESE ROUND TRIPS WERE IN AND OUT OF 'KAMIKAZE ALLEY' (AKA, BUR). CREW REST WAS APPROX 14 HRS BTWN EACH OF THESE DAYS. THERE IS SUCH A LET DOWN WHEN NOT DODGING ACFT IN AND OUT OF BUR THAT ONE TENDS TO RELAX AND NOT PAY AS MUCH ATTN AS NEEDED AT CRUISE FLT. WE ALSO NOTED A NEAR MISS OF 2 LIGHT ACFT IN THE BUR AREA ON THE PREVIOUS LEG. ALSO THE LOUD VOL OF THE TCAS SYS CONSTANTLY YELLING AT ONE CONTRIBUTES GREATLY TO OVERALL COCKPIT FATIGUE.

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.