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Light transport turboprop blade found with delamination of the composite material during preflight inspection.
| Attributes | |
| ACN | 326683 |
| Time | |
| Date | 199601 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : atl |
| State Reference | GA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other Other |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | other other : other pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 13000 flight time type : 4000 |
| ASRS Report | 326683 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Preflight inspection found delaminated propeller blade. Affected area was near tip of blade and approximately the size of an egg, appeared also to be delaminated all the way to the metal shaft in center of blade. Mechanics inspected blade and signed off as airworthy based on a letter from hamilton-standard that stated as much as 25 square inches of delamination was acceptable. We flew aircraft, no incidents. Please question the airworthiness of such a large amount of delamination of a composite propeller blade. The EMB120 has hamilton-standard 14RF.9 propellers.
Original NASA ASRS Text
Title: LTT TURBOPROP BLADE FOUND WITH DELAMINATION OF THE COMPOSITE MATERIAL DURING PREFLT INSPECTION.
Narrative: PREFLT INSPECTION FOUND DELAMINATED PROP BLADE. AFFECTED AREA WAS NEAR TIP OF BLADE AND APPROX THE SIZE OF AN EGG, APPEARED ALSO TO BE DELAMINATED ALL THE WAY TO THE METAL SHAFT IN CTR OF BLADE. MECHS INSPECTED BLADE AND SIGNED OFF AS AIRWORTHY BASED ON A LETTER FROM HAMILTON-STANDARD THAT STATED AS MUCH AS 25 SQUARE INCHES OF DELAMINATION WAS ACCEPTABLE. WE FLEW ACFT, NO INCIDENTS. PLEASE QUESTION THE AIRWORTHINESS OF SUCH A LARGE AMOUNT OF DELAMINATION OF A COMPOSITE PROP BLADE. THE EMB120 HAS HAMILTON-STANDARD 14RF.9 PROPS.
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.