| ABBREVIATED AVIATION ACCIDENT REPORT (AAAR) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Source | PRAM | |||||||
| 1. Case Number | 1a. Date of Accident | 1b. Time | 1c. Aircraft Serial Number | 2a. Classification | 2b. Category | |||
| 19770906009 | Sep 06 1977 | 0900 | 6815993 | E | ||||
| 3. Type of Aircraft | 4. Period Of Day | 5. No Acft Involved | 6. Nearest Installation | |||||
| CH47C | DAY | 1 | GE048 - AUGSBURG (CTY), FRG | |||||
| 7. Accident Location | a. Off Post | b. Not On Airfield | e. GERMANY | |||||
| 8. Organization Involved in Accident | ||||||||
| Unit | UIC7 | UIC6 | UIC5 | UIC4 | UIC3 | UIC2 | Army Headquarters Element | Station |
| WC5LAA | WAAFFF | W0ANAA | GE760 | |||||
| 180AVCO | 11AV GP | USAREUR | SCHWABISCH HALL, FRG | |||||
| 9. Organization Accountable for Accident | ||||||||
| WC5LAA | WAAFFF | W0ANAA | GE760 | |||||
| 180AVCO | 11AV GP | USAREUR | SCHWABISCH HALL, FRG | |||||
| 10. Estimated Accident Cost | ||||||||
| a. Total Loss | b. Aircraft Damage | c. Man Hrs | d. Man Hrs Cost | e. Other Mil Damage | ||||
| No | $0 | 0 | $0 | $0 | ||||
| f. Civilian Damage | g. Injury | h. Total This Aircraft | i. Total Accident | |||||
| $0 | $0 | $0 | $0 | |||||
| 11. General Data | ||||||||
| a. Mission | S/M | b. Flight Plan | c. Data Recorder | |||||
| S - SERVICE | VFR | |||||||
| 13 - SUPPORT | ||||||||
| d. Night Vision | e. Fire | f. Fluid Spillage | g. Field Training | |||||
| NONE | No | |||||||
| 12. Flight Data | ||||||||
| a. Emergency | Duration | Phase of Operation | ||||||
| 0 | G - CRUISE | |||||||
| AGL | KIAS | Weight | Overgross | |||||
| 130 | ||||||||
| b. Termination | Duration | Phase of Operation | ||||||
| .3 | - | |||||||
| AGL | KIAS | Weight | Overgross | |||||
| 13. Type Event | ||||||||
| 01 - Precautionary Landing | ||||||||
| 14. Accident Cause Factors | Human Error | Material Failure | Environmental | |||||
| UNKNOWN | DEFINITE | NO | ||||||
| 15. Summary | ||||||||
| WHILE CRUISING AT 200 FT AGL, 130 KTS, PILOTS FELT LATERAL VIBRATIONS THAT CONTINUED TO INCREASE IN INTENSITY. ACFT WAS LANDED AND SHUT DOWN FOR INSPECTION. FORWARD ROTOR HEAD WAS TOO HOT TO TOUCH, TO TOUCH, HORIZONTAL HINGE PIN BEARING ON YELLOW BLADE HAD FAILED. HORIZONTAL HINGE PIN AND BEARING ON FORWARD ROTOR HEAD OVERHEATED.żż | ||||||||
| 16. COMPONENT AND PART FAILURE/MALFUNCTION DATA | ||||||||
| Major Component Information | ||||||||
| a. Nomenclature | b. Type/Design/Series | c. Part Number | d. NSN | e. MFG Code | f. Part Serial No | |||
| ROTOR & XMSN | ||||||||
| Part Information | ||||||||
| a. Nomenclature | c. Part Number | d. NSN | e. MFG Code | f. Part Serial No | ||||
| PIN | 114R21971 | 1615001858295 | 77272 | |||||
| g. Cause Failure | Functional Group | |||||||
| Material | Maintenance | Design | Manufacture | 04 - ROTOR AND TRANSMISSION 08 - MAIN ROTORS, NOT BLADES | ||||
| DEFINITE ROLE | NONE | 50 - GRIP 08 - EIGHT | ||||||
| Type Failure | Cause Failure | |||||||
| 509 - SPALLED | - | 859 - METAL FATIGUE | - | |||||
| 17. ENVIRONMENTAL | ||||||||
| a. General | (1) IMC | (2) VMC | (3) Unknown | |||||
| b. Environmental Conditions | ||||||||
| 1. Weather Conditions | 2. Other Conditions | |||||||
| (a) Hail | (a) Animals | |||||||
| (b) Sleet | (b) Fowl | |||||||
| (c) Fog | (c) Surface | |||||||
| (d) Drizzle | (d) Noise | |||||||
| (e) Rain | (e) Chemicals | |||||||
| (f) Snow | (f) Radiation | |||||||
| (g) Lightning | (g) Glare | |||||||
| (h) Thunderstorm | (h) FOD | |||||||
| (i) Gusty Winds | (i) Temperature | |||||||
| (j) Freezing Rain | (j) Vibration | |||||||
| (k) Other | (k) Dust | |||||||
| c. Aircraft Icing | No Yes | d. Turbulence | No Yes | |||||
| 19. MOON ILLUMINATION DATA | ||||||||
| a. Above Horizon | b. Visible | c. Degrees Above Horizon | d. Percent Illumination | e. Clock Position | ||||
| No Yes | No Yes | |||||||
| 20. WIRE STRIKE DATA | ||||||||
| a. Wire Strike | b. WSPS Installed | c. WSPS Engaged | ||||||
| No Yes | No Yes | No Yes | ||||||
| d. WSPS Cut Wire | e. WSPS Functioned | f. Wires Struck | ||||||
| No Yes | No Yes | Number wires | 0 | Dia.(inches) | ||||
| 21. PERSONNEL DATA | ||||||||
| Person # 1 | c. Grade | d. Sex | e. Duty | |||||
| W4 | PI - PILOT | |||||||
| f. SVC | g. UIC | h. Role | i. On Controls | |||||
| O - OTHER | WC5LAA | U - UNKNOWN | No Yes | |||||
| j. Lab Test | k. Hrs Slept 24 | l. Hrs Worked 24 | m. Hrs Flown 24 | |||||
| Yes No | ||||||||
| n. RL | o. FAC | p. Injury | q. MTDS Total Flt Hrs | |||||
| 1 2 3 | 1 2 3 | - | 0 | |||||
| Person # 2 | c. Grade | d. Sex | e. Duty | |||||
| W2 | PC - PILOT IN COMMAND | |||||||
| f. SVC | g. UIC | h. Role | i. On Controls | |||||
| O - OTHER | WC5LAA | U - UNKNOWN | No Yes | |||||
| j. Lab Test | k. Hrs Slept 24 | l. Hrs Worked 24 | m. Hrs Flown 24 | |||||
| Yes No | ||||||||
| n. RL | o. FAC | p. Injury | q. MTDS Total Flt Hrs | |||||
| 1 2 3 | 1 2 3 | - | 0 | |||||
| 22. IMPACT/PROTECTIVE/ESCAPE/SURVIVAL/RESCUE DATA | ||||||||
| a. Aircraft Space Compromised | b. Escape/Survival Difficulties | c. Protective/Restraint Equip Functioned | ||||||
| No Yes | No Yes | No Yes | ||||||
| 24. FINDINGS AND RECOMMENDATIONS | ||||||||
| Findings | ||||||||
| DISASSEMBLY INSPECTION REPORT--CH-47C, 68-15993 CONCLUSIONS A. ANALYTICAL INVESTIGATION OF THE MAIN ROTOR HEAD ASSY REVEALED THE PRIMARY FAILURE WAS THROUGH SPALLING FATIGUE MECHANISMS OF THE PIN AND BEARING RACEWAYS. B. THE ROLLER BEARINGS FAILED THROUGH IMPACT LOADING. REF: LABORATORY REPORT NUMBER 78MX25 (INCL 11-18). | ||||||||
| Recommendations | ||||||||
| Not Reported | ||||||||