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A B737-300 was found to have 1 fan blade on the left engine with the leading edge curled at mid span. No documentation on blade damage found in logbook.
| Attributes | |
| ACN | 616618 |
| Time | |
| Date | 200405 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 200 flight time total : 7000 flight time type : 2400 |
| ASRS Report | 616618 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 210 flight time total : 19500 flight time type : 14000 |
| ASRS Report | 616624 |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : birds maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : inspection performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Maintenance Manual |
Narrative:
During preflight inspection, I noted a 1.5 inch deformity on a #1 engine fan blade. The deformity was on a leading edge at mid-span and appeared to be the result of a small bird strike. The word 'ok' was written next to the deformity on the fan blade. I notified the captain and we checked the logbook. In the deferred maintenance section, we found the following entry: #1 engine requires borescope inspection within next 10 cycles for bird strike.' below was written: 'borescope performed. No defects noted.' clearance XXXX apr/xa/04. We discussed the write-up and concluded the engine and aircraft was good to fly. Later, after further discussion on the 3RD leg of the day, we reexamined the logbook and noted that there was no specific reference to the fan blade -- only that the engine had 'no defects.' there was nothing indicating the fan blade had been damaged and then later cleared for flight. We agreed that an 'ok' on the fan blade without documentation in the logbook is probably insufficient. The information should have been annotated in the logbook for flight crew review.
Original NASA ASRS Text
Title: A B737-300 WAS FOUND TO HAVE 1 FAN BLADE ON THE L ENG WITH THE LEADING EDGE CURLED AT MID SPAN. NO DOCUMENTATION ON BLADE DAMAGE FOUND IN LOGBOOK.
Narrative: DURING PREFLT INSPECTION, I NOTED A 1.5 INCH DEFORMITY ON A #1 ENG FAN BLADE. THE DEFORMITY WAS ON A LEADING EDGE AT MID-SPAN AND APPEARED TO BE THE RESULT OF A SMALL BIRD STRIKE. THE WORD 'OK' WAS WRITTEN NEXT TO THE DEFORMITY ON THE FAN BLADE. I NOTIFIED THE CAPT AND WE CHKED THE LOGBOOK. IN THE DEFERRED MAINT SECTION, WE FOUND THE FOLLOWING ENTRY: #1 ENG REQUIRES BORESCOPE INSPECTION WITHIN NEXT 10 CYCLES FOR BIRD STRIKE.' BELOW WAS WRITTEN: 'BORESCOPE PERFORMED. NO DEFECTS NOTED.' CLRNC XXXX APR/XA/04. WE DISCUSSED THE WRITE-UP AND CONCLUDED THE ENG AND ACFT WAS GOOD TO FLY. LATER, AFTER FURTHER DISCUSSION ON THE 3RD LEG OF THE DAY, WE REEXAMINED THE LOGBOOK AND NOTED THAT THERE WAS NO SPECIFIC REF TO THE FAN BLADE -- ONLY THAT THE ENG HAD 'NO DEFECTS.' THERE WAS NOTHING INDICATING THE FAN BLADE HAD BEEN DAMAGED AND THEN LATER CLRED FOR FLT. WE AGREED THAT AN 'OK' ON THE FAN BLADE WITHOUT DOCUMENTATION IN THE LOGBOOK IS PROBABLY INSUFFICIENT. THE INFO SHOULD HAVE BEEN ANNOTATED IN THE LOGBOOK FOR FLT CREW REVIEW.
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.