Beech 1900D flown in non compliance with MEL after the crew advised maintenance and were released in...

Attributes
ACN	469320
Time
Date	200004
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : roc.tower
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 220 flight time total : 1310 flight time type : 300
ASRS Report	469320
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : non compliance with mel
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	performance deficiency : logbook entry performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Maintenance Human Performance Flight Crew Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

Pressurization system had been written up on mar/xa/00. It was properly written up and we had 10 days before needed maintenance. We had thought that the plane became grounded at XA00 apr/xb/00 and unfortunately it became grounded on apr/xa/00. The company had the same thought process as well, so no flags arose on the night of apr/xa/00. We called maintenance the night of apr/xb/00 and told them that we thought the plane needed maintenance at the end of the night, but they told us to go on and take it home, so we did. We simply made a miscalculation on our 10 days and did not mean to overfly the MEL.

Original NASA ASRS Text

Title: BEECH 1900D FLOWN IN NON COMPLIANCE WITH MEL AFTER THE CREW ADVISED MAINT AND WERE RELEASED IN ERROR.

Narrative: PRESSURIZATION SYS HAD BEEN WRITTEN UP ON MAR/XA/00. IT WAS PROPERLY WRITTEN UP AND WE HAD 10 DAYS BEFORE NEEDED MAINT. WE HAD THOUGHT THAT THE PLANE BECAME GNDED AT XA00 APR/XB/00 AND UNFORTUNATELY IT BECAME GNDED ON APR/XA/00. THE COMPANY HAD THE SAME THOUGHT PROCESS AS WELL, SO NO FLAGS AROSE ON THE NIGHT OF APR/XA/00. WE CALLED MAINT THE NIGHT OF APR/XB/00 AND TOLD THEM THAT WE THOUGHT THE PLANE NEEDED MAINT AT THE END OF THE NIGHT, BUT THEY TOLD US TO GO ON AND TAKE IT HOME, SO WE DID. WE SIMPLY MADE A MISCALCULATION ON OUR 10 DAYS AND DID NOT MEAN TO OVERFLY THE MEL.

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.

Beech 1900D flown in non compliance with MEL after the crew advised maintenance and were released in error.