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A technician reports, after installing an enhanced ground proximity warning system computer in an E145, he was instructed to sign off the aircraft as ground proximity warning system equipped, not enhanced equipped.
| Attributes | |
| ACN | 628044 |
| Time | |
| Date | 200401 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 628044 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : work cards performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | Acft Maint Manual |
Narrative:
While testing GPWS/egpws on EMB145 fleet, the reset switch test worked fine on the work packs. We were told to sign off as a GPWS not egpws as per lead service bulletin that was training me. I was told we have no egpws. I asked how come it will test that way and a egpws computer installed? Told me still configure as a GPWS. I told inspection department about this. He asked, the lead told him GPWS. So this got signed off as GPWS. I have looked in to the 'amm,' does not tell what aircraft was what. Also the test switch and the flight deck switch labeled as GPWS. Ipc shows egpws. Inquired with embraer representative. He e-mailed embraer service engineering and was told all aircraft that have GPWS switch under the EICAS display unit is an egpws even though labeled as GPWS. I have brought this up. The aircraft test fine and paper was the issue.
Original NASA ASRS Text
Title: A TECHNICIAN RPTS, AFTER INSTALLING AN ENHANCED GND PROX WARNING SYS COMPUTER IN AN E145, HE WAS INSTRUCTED TO SIGN OFF THE ACFT AS GND PROX WARNING SYS EQUIPPED, NOT ENHANCED EQUIPPED.
Narrative: WHILE TESTING GPWS/EGPWS ON EMB145 FLEET, THE RESET SWITCH TEST WORKED FINE ON THE WORK PACKS. WE WERE TOLD TO SIGN OFF AS A GPWS NOT EGPWS AS PER LEAD SVC BULLETIN THAT WAS TRAINING ME. I WAS TOLD WE HAVE NO EGPWS. I ASKED HOW COME IT WILL TEST THAT WAY AND A EGPWS COMPUTER INSTALLED? TOLD ME STILL CONFIGURE AS A GPWS. I TOLD INSPECTION DEPT ABOUT THIS. HE ASKED, THE LEAD TOLD HIM GPWS. SO THIS GOT SIGNED OFF AS GPWS. I HAVE LOOKED IN TO THE 'AMM,' DOES NOT TELL WHAT ACFT WAS WHAT. ALSO THE TEST SWITCH AND THE FLT DECK SWITCH LABELED AS GPWS. IPC SHOWS EGPWS. INQUIRED WITH EMBRAER REPRESENTATIVE. HE E-MAILED EMBRAER SVC ENGINEERING AND WAS TOLD ALL ACFT THAT HAVE GPWS SWITCH UNDER THE EICAS DISPLAY UNIT IS AN EGPWS EVEN THOUGH LABELED AS GPWS. I HAVE BROUGHT THIS UP. THE ACFT TEST FINE AND PAPER WAS THE ISSUE.
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.