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An embraer 145 captain reported radome damage and delamination. Technician said it was ok for service. Manual check found radome out of limits.
| Attributes | |
| ACN | 598716 |
| Time | |
| Date | 200311 |
| Day | Tue |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Embraer Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| ASRS Report | 598716 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other Other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : inspection performance deficiency : unqualified personnel performance deficiency : testing |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
Narrative:
On arrival at aircraft saw radome was damaged and exhibited areas of delamination underneath the plastic erosion booth. Areas showing erosion were both black and beige. I have been told that black is the static protection material and beige is the actual composite structure. The boot was damaged and exposed the previously mentioned delamination the mechanic first said that the damage was ok. When we insisted that water could get into the radome, he unhooked the fasteners and tilted up the radome and said, see there is no water running out inside, so it's ok. He insisted that the composite structure could not take on water unless it ran out of the tilted radome. Finally we convinced the mechanic to check. He went inside at 30 mins later came out with guidance from emb that says no more than 1 square inch total on the radome could be exposed or it was a no go item.
Original NASA ASRS Text
Title: AN EMBRAER 145 CAPT RPTED RADOME DAMAGE AND DELAMINATION. TECHNICIAN SAID IT WAS OK FOR SVC. MANUAL CHK FOUND RADOME OUT OF LIMITS.
Narrative: ON ARR AT ACFT SAW RADOME WAS DAMAGED AND EXHIBITED AREAS OF DELAMINATION UNDERNEATH THE PLASTIC EROSION BOOTH. AREAS SHOWING EROSION WERE BOTH BLACK AND BEIGE. I HAVE BEEN TOLD THAT BLACK IS THE STATIC PROTECTION MATERIAL AND BEIGE IS THE ACTUAL COMPOSITE STRUCTURE. THE BOOT WAS DAMAGED AND EXPOSED THE PREVIOUSLY MENTIONED DELAMINATION THE MECH FIRST SAID THAT THE DAMAGE WAS OK. WHEN WE INSISTED THAT WATER COULD GET INTO THE RADOME, HE UNHOOKED THE FASTENERS AND TILTED UP THE RADOME AND SAID, SEE THERE IS NO WATER RUNNING OUT INSIDE, SO IT'S OK. HE INSISTED THAT THE COMPOSITE STRUCTURE COULD NOT TAKE ON WATER UNLESS IT RAN OUT OF THE TILTED RADOME. FINALLY WE CONVINCED THE MECH TO CHK. HE WENT INSIDE AT 30 MINS LATER CAME OUT WITH GUIDANCE FROM EMB THAT SAYS NO MORE THAN 1 SQUARE INCH TOTAL ON THE RADOME COULD BE EXPOSED OR IT WAS A NO GO ITEM.
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.