<< >> NASA ASRS Report 724295, September 2006

A B757-200 during a heavy check had the incorrect emergency locator beacon installed. Airplane operated several weeks before discovery.

Attributes
ACN	724295
Time
Date	200609
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
ASRS Report	724295
Person 2
Affiliation	company : air carrier
Function	maintenance : lead technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Independent Detector	other other : 3
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : manuals contributing factor : work cards performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance performance deficiency : logbook entry performance deficiency : installation performance deficiency : inspection
Supplementary
Problem Areas	Aircraft Chart Or Publication Environmental Factor Maintenance Human Performance
Primary Problem	Maintenance Human Performance
Situations
Publication	Illustrated Parts Catalog

Narrative:

I learned of this event almost 4 months after it had occurred. I was told that I installed the wrong effectivity locator beacon on aircraft X during my emergency equipment inspection; during the B757 B check. I installed a part and it should have been another part. It was purely unintentional to put the wrong locator beacon on the aircraft. The evening after learning of the event I spoke to my B check lead technician and he said and I agreed that the B check paperwork could use some clarification. A part number on the locator beacon would surely help. Plus effectivity clarification. Even by using the parts catalog it was confusing. A misunderstanding; due to unclr paperwork. Is it possible to have part numbers put on the emergency locator beacons; as it is on most other emergency equipment?

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Original NASA ASRS Text

Title: A B757-200 DURING A HVY CHK HAD THE INCORRECT EMER LOCATOR BEACON INSTALLED. AIRPLANE OPERATED SEVERAL WEEKS BEFORE DISCOVERY.

Narrative: I LEARNED OF THIS EVENT ALMOST 4 MONTHS AFTER IT HAD OCCURRED. I WAS TOLD THAT I INSTALLED THE WRONG EFFECTIVITY LOCATOR BEACON ON ACFT X DURING MY EMER EQUIP INSPECTION; DURING THE B757 B CHK. I INSTALLED A PART AND IT SHOULD HAVE BEEN ANOTHER PART. IT WAS PURELY UNINTENTIONAL TO PUT THE WRONG LOCATOR BEACON ON THE ACFT. THE EVENING AFTER LEARNING OF THE EVENT I SPOKE TO MY B CHK LEAD TECHNICIAN AND HE SAID AND I AGREED THAT THE B CHK PAPERWORK COULD USE SOME CLARIFICATION. A PART NUMBER ON THE LOCATOR BEACON WOULD SURELY HELP. PLUS EFFECTIVITY CLARIFICATION. EVEN BY USING THE PARTS CATALOG IT WAS CONFUSING. A MISUNDERSTANDING; DUE TO UNCLR PAPERWORK. IS IT POSSIBLE TO HAVE PART NUMBERS PUT ON THE EMER LOCATOR BEACONS; AS IT IS ON MOST OTHER EMER EQUIP?

Data retrieved from NASA's ASRS site as of January 2009 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.