An L1011 was dispatched in non compliance with the #3 engine high pressure bleed valve deferred as inoperative per the MEL list, but entered in the aircraft records as #2 high pressure bleed valve.

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Attributes
ACN	501108
Time
Date	200102
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	L-1011 Tri-Star All Series
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	oversight : supervisor
Qualification	technician : powerplant technician : airframe
Experience	maintenance supervisor : 28
ASRS Report	501108
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : non compliance with mel non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb other other : person 5
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : manuals contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : logbook entry
Supplementary
Problem Areas	Aircraft Maintenance Human Performance Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

Air carrier airlines ship xyz had the #3 high pressure valve on maintenance carryover per MEL 36-11-01. The restr remark in the computer showed the #2 high pressure valve was inoperative. Air carrier flight XXX called on the radio wanting to put the #3 pack valve on maintenance carryover per MEL 21-21-01A. This is a flight crew placard item. I gave them a contract number per our procedures. The crew called back after airborne and advised me this MEL was not legal as the #3 high pressure valve was on maintenance carryover also. MEL 21-21-01A requires the high pressure valve, isolation valve and xbleed valve be operative for the respective pack valve. I read the write-up for the high pressure valve and it was for #3 engine, not #2 as it was restr. I am stopping this aircraft in ZZZ to have this pack repaired before further flight. This was not intentional, but caused by a typographical error.

Original NASA ASRS Text

Title: AN L1011 WAS DISPATCHED IN NON COMPLIANCE WITH THE #3 ENG HIGH PRESSURE BLEED VALVE DEFERRED AS INOP PER THE MEL LIST, BUT ENTERED IN THE ACFT RECORDS AS #2 HIGH PRESSURE BLEED VALVE.

Narrative: ACR AIRLINES SHIP XYZ HAD THE #3 HIGH PRESSURE VALVE ON MAINT CARRYOVER PER MEL 36-11-01. THE RESTR REMARK IN THE COMPUTER SHOWED THE #2 HIGH PRESSURE VALVE WAS INOP. ACR FLT XXX CALLED ON THE RADIO WANTING TO PUT THE #3 PACK VALVE ON MAINT CARRYOVER PER MEL 21-21-01A. THIS IS A FLC PLACARD ITEM. I GAVE THEM A CONTRACT NUMBER PER OUR PROCS. THE CREW CALLED BACK AFTER AIRBORNE AND ADVISED ME THIS MEL WAS NOT LEGAL AS THE #3 HIGH PRESSURE VALVE WAS ON MAINT CARRYOVER ALSO. MEL 21-21-01A REQUIRES THE HIGH PRESSURE VALVE, ISOLATION VALVE AND XBLEED VALVE BE OPERATIVE FOR THE RESPECTIVE PACK VALVE. I READ THE WRITE-UP FOR THE HIGH PRESSURE VALVE AND IT WAS FOR #3 ENG, NOT #2 AS IT WAS RESTR. I AM STOPPING THIS ACFT IN ZZZ TO HAVE THIS PACK REPAIRED BEFORE FURTHER FLT. THIS WAS NOT INTENTIONAL, BUT CAUSED BY A TYPOGRAPHICAL ERROR.

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.