Aircraft flown without performance of required aircraft line check.

Attributes
ACN	183964
Time
Date	199107
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lbb
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Navigation In Use	Other
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
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 : 800
ASRS Report	183964
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 1000
ASRS Report	184425
Events
Anomaly	non adherence : far non adherence : published procedure
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our maintenance procedures require a line check every 3 days. We departed on day 3 for an overnight. Inspection had been done at K O'clock on day 1. Thinking we had till midnight, it was no problem. In reality the program counts the day the inspection is done as day 1 regardless of the time so if done at 2359 the inspection is good for only 2 days and 1 min not 3-24 hour periods. Maintenance control (prior to our departure on day 4), called and wanted to know the date of the last line check. We were on the ramp and advised them (through the station - lbb) that it was K O'clock on day 1. Still unaware of the problem we taxied out but prior to takeoff we called the station to see if they had relayed the information to maintenance. They said yes and that we were to call maintenance when we got to ama. In ama we discovered that we were not legal. We (at this point) don't know why we were told to call from ama unless possibly they thought we were in the air and not just off the gate. Our operation makes this firmly maintenance's responsibility, just as surely the captain's responsibility to check, and since it is in the operations manual that I'm required to carry and know, the buck stopped here but I misunderstood the time calculations.

Original NASA ASRS Text

Title: ACFT FLOWN WITHOUT PERFORMANCE OF REQUIRED ACFT LINE CHK.

Narrative: OUR MAINT PROCS REQUIRE A LINE CHK EVERY 3 DAYS. WE DEPARTED ON DAY 3 FOR AN OVERNIGHT. INSPECTION HAD BEEN DONE AT K O'CLOCK ON DAY 1. THINKING WE HAD TILL MIDNIGHT, IT WAS NO PROBLEM. IN REALITY THE PROGRAM COUNTS THE DAY THE INSPECTION IS DONE AS DAY 1 REGARDLESS OF THE TIME SO IF DONE AT 2359 THE INSPECTION IS GOOD FOR ONLY 2 DAYS AND 1 MIN NOT 3-24 HR PERIODS. MAINT CTL (PRIOR TO OUR DEP ON DAY 4), CALLED AND WANTED TO KNOW THE DATE OF THE LAST LINE CHK. WE WERE ON THE RAMP AND ADVISED THEM (THROUGH THE STATION - LBB) THAT IT WAS K O'CLOCK ON DAY 1. STILL UNAWARE OF THE PROBLEM WE TAXIED OUT BUT PRIOR TO TKOF WE CALLED THE STATION TO SEE IF THEY HAD RELAYED THE INFO TO MAINT. THEY SAID YES AND THAT WE WERE TO CALL MAINT WHEN WE GOT TO AMA. IN AMA WE DISCOVERED THAT WE WERE NOT LEGAL. WE (AT THIS POINT) DON'T KNOW WHY WE WERE TOLD TO CALL FROM AMA UNLESS POSSIBLY THEY THOUGHT WE WERE IN THE AIR AND NOT JUST OFF THE GATE. OUR OP MAKES THIS FIRMLY MAINT'S RESPONSIBILITY, JUST AS SURELY THE CAPT'S RESPONSIBILITY TO CHK, AND SINCE IT IS IN THE OPS MANUAL THAT I'M REQUIRED TO CARRY AND KNOW, THE BUCK STOPPED HERE BUT I MISUNDERSTOOD THE TIME CALCULATIONS.

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.