Flight crew flew aircraft with 25-hour service overdue.

Attributes
ACN	145873
Time
Date	199005
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise 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 : 200 flight time total : 8300 flight time type : 200
ASRS Report	145873
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

During preflight we noticed (first officer and I) that the 25 hours service check was due 4 hours later (hobbs time). We notified the company mechanic and he said that he would take care of it later in the day. We went out flying 2 round trips, returning each time to msp (the company base of maintenance). After leaving msp for the last flight of the day, we noticed in-flight that the service check had not been performed. We immediately returned to msp. We overflew the service check by .9 hours. Because of delays and WX we accumulated during the day, and trying to be on schedule for the last trip, we forgot about the service check.

Original NASA ASRS Text

Title: FLT CREW FLEW ACFT WITH 25-HOUR SERVICE OVERDUE.

Narrative: DURING PREFLT WE NOTICED (F/O AND I) THAT THE 25 HRS SVC CHK WAS DUE 4 HRS LATER (HOBBS TIME). WE NOTIFIED THE COMPANY MECH AND HE SAID THAT HE WOULD TAKE CARE OF IT LATER IN THE DAY. WE WENT OUT FLYING 2 ROUND TRIPS, RETURNING EACH TIME TO MSP (THE COMPANY BASE OF MAINT). AFTER LEAVING MSP FOR THE LAST FLT OF THE DAY, WE NOTICED INFLT THAT THE SVC CHK HAD NOT BEEN PERFORMED. WE IMMEDIATELY RETURNED TO MSP. WE OVERFLEW THE SVC CHK BY .9 HRS. BECAUSE OF DELAYS AND WX WE ACCUMULATED DURING THE DAY, AND TRYING TO BE ON SCHEDULE FOR THE LAST TRIP, WE FORGOT ABOUT THE SVC CHK.

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.