An airbus 320 with an ILS VOR receiver report is cleared using a manufacturer's service letter.

Attributes
ACN	422478
Time
Date	199812
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	ground : parked
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	422478
Person 2
Affiliation	company : air carrier
Function	other personnel other oversight : supervisor
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	aircraft : equipment problem dissipated
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Aircraft xyz arrived ZZZ approximately XA00 dec/xa/98. Pilot reported (navigation ILS 2 fault) intermittent in logbook. In pilot's flight manual there is a procedure for dealing with this fault. In flight information letter xx-Y, page 4, it tells pilot to pull circuit breaker for multi-mode receivers and reset them. If problem goes away, then multi-mode receiver is considered ok. In line air carrier manual we have a letter dated oct/xc/98 from airbus industries stating the operation recommendation and maintenance recommendations. The aircraft didn't have a fault latched on ECAM after it arrived at the gate. The way I read the airbus letter, if the fault is latched then pull circuit breaker and if it resets then it's ok. There was no fault showing on ECAM. After talking to maintenance control and airbus representative and pilots, I signed the logbook off, referencing the pilots handbook and letter xx-Y, page 4. Believing that this would be a CAT item, I wasn't sure if this was proper to use a letter from airbus.

Original NASA ASRS Text

Title: AN AIRBUS 320 WITH AN ILS VOR RECEIVER RPT IS CLRED USING A MANUFACTURER'S SVC LTR.

Narrative: ACFT XYZ ARRIVED ZZZ APPROX XA00 DEC/XA/98. PLT RPTED (NAV ILS 2 FAULT) INTERMITTENT IN LOGBOOK. IN PLT'S FLT MANUAL THERE IS A PROC FOR DEALING WITH THIS FAULT. IN FLT INFO LETTER XX-Y, PAGE 4, IT TELLS PLT TO PULL CIRCUIT BREAKER FOR MULTI-MODE RECEIVERS AND RESET THEM. IF PROB GOES AWAY, THEN MULTI-MODE RECEIVER IS CONSIDERED OK. IN LINE ACR MANUAL WE HAVE A LETTER DATED OCT/XC/98 FROM AIRBUS INDUSTRIES STATING THE OP RECOMMENDATION AND MAINT RECOMMENDATIONS. THE ACFT DIDN'T HAVE A FAULT LATCHED ON ECAM AFTER IT ARRIVED AT THE GATE. THE WAY I READ THE AIRBUS LETTER, IF THE FAULT IS LATCHED THEN PULL CIRCUIT BREAKER AND IF IT RESETS THEN IT'S OK. THERE WAS NO FAULT SHOWING ON ECAM. AFTER TALKING TO MAINT CTL AND AIRBUS REPRESENTATIVE AND PLTS, I SIGNED THE LOGBOOK OFF, REFING THE PLTS HANDBOOK AND LETTER XX-Y, PAGE 4. BELIEVING THAT THIS WOULD BE A CAT ITEM, I WASN'T SURE IF THIS WAS PROPER TO USE A LETTER FROM AIRBUS.

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.