Flight crew distracted by operation of the pressure control system in standby results in flying thro...

Attributes
ACN	103539
Time
Date	198901
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : fgt
State Reference	MN
Altitude	msl bound lower : 15000 msl bound upper : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nsp
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	enroute airway : msp
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 5400 flight time type : 40
ASRS Report	103539
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Became involved in adjusting pressurization for the descent into kmsp and accidentally overflew canen intersection on V411 from rst to fgt. (Flew several mi west of the fgt 178 degree right before realizing it.) the use of standby mode of pressurization control is mandated by a restriction to 5.67 psi pressure differential on the medium large transport until a structural inspection is completed. A higher than normal cabin rate of descent is usually necessary and the whole procedure is a little distracting. Also, this was my third day with poor sleep due to early morning wake-ups.

Original NASA ASRS Text

Title: FLT CREW DISTRACTED BY OPERATION OF THE PRESSURE CONTROL SYSTEM IN STANDBY RESULTS IN FLYING THROUGH INTERSECTION.

Narrative: BECAME INVOLVED IN ADJUSTING PRESSURIZATION FOR THE DSCNT INTO KMSP AND ACCIDENTALLY OVERFLEW CANEN INTXN ON V411 FROM RST TO FGT. (FLEW SEVERAL MI W OF THE FGT 178 DEG R BEFORE REALIZING IT.) THE USE OF STANDBY MODE OF PRESSURIZATION CONTROL IS MANDATED BY A RESTRICTION TO 5.67 PSI PRESSURE DIFFERENTIAL ON THE MLG UNTIL A STRUCTURAL INSPECTION IS COMPLETED. A HIGHER THAN NORMAL CABIN RATE OF DSCNT IS USUALLY NECESSARY AND THE WHOLE PROC IS A LITTLE DISTRACTING. ALSO, THIS WAS MY THIRD DAY WITH POOR SLEEP DUE TO EARLY MORNING WAKE-UPS.

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.

Flight crew distracted by operation of the pressure control system in standby results in flying through intersection.