# NTSB WPR11LA070: Bellanca 7KCAB, N11858, Corona, CA, December 2, 2010 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: December 2, 2010, 10:30 local (18:30 UTC) - Place: Corona, CA - Coordinates: 33.890277, -117.543609 - Nearby events: https://openairdocs.org/map.md?lat=33.8903&lon=-117.5436&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering: Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report August 15, 2012 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 77928 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11LA070 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/77928/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=77928 - Page: https://openairdocs.org/ntsb/WPR11LA070 ## Probable cause The total loss of engine power due to oil exhaustion as a result of a broken oil line. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Eng oil sys (airframe furnish): eng oil dist (airframe furn)](https://openairdocs.org/ntsb-findings/01057920): Aircraft › Aircraft power plant · Failure (probable cause); cases with it: [Bellanca 7KCAB, 1 case](https://openairdocs.org/ntsb-findings/01057920/cases.md?model=1220701), [All aircraft, 18 cases](https://openairdocs.org/ntsb-findings/01057920/cases.md) - [Fluids: oil](https://openairdocs.org/ntsb-findings/01071020): Aircraft › Fluids/misc hardware · Fluid level; cases with it: [Bellanca 7KCAB, 1 case](https://openairdocs.org/ntsb-findings/01071020/cases.md?model=1220701), [All aircraft, 174 cases](https://openairdocs.org/ntsb-findings/01071020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering: Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340) (defining event); cases with it: [Bellanca 7KCAB, 1 case](https://openairdocs.org/ntsb-events/340/sequence.md?model=1220701), [All aircraft, 820 cases](https://openairdocs.org/ntsb-events/340/sequence.md) - [Maneuvering: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341); cases with it: [Bellanca 7KCAB, 3 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=1220701), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Bellanca 7KCAB, 3 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=1220701), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Bellanca 7KCAB, 7 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=1220701), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis During an instructional flight, the engine experienced a total loss of power. The flight instructor took over the controls and made a forced landing on a golf course. During the landing roll, the airplane nosed over into a sand trap, damaging the tail and fuselage. Postaccident examination of the airplane revealed a large amount of oil covering the underside of the fuselage. Examination of the engine revealed that the oil pressure line had failed just aft of the “B” nut that connected the line to the engine fitting resulting in the loss of all engine oil. Chaff marks were noted on the metal sleeve between the “B” nut and the flexible portion of the line. These chaff marks were the result of rubbing against the bottom side of the engine shock mount assembly. When the undamaged end of the oil line was installed on the engine fitting, it was noted that there was visible clearance between the line and the engine shock mount. It is likely that, with the engine operating, vibration resulted in contact between the line and the mount. ## Factual narrative HISTORY OF FLIGHT On December 2, 2010, about 1030 Pacific standard time (PST), a Bellanca 7KCAB, N11858, made a forced landing following a total loss of engine power near Corona, California. Alliance International Aviation was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The certified flight instructor was uninjured, and the commercial pilot undergoing instruction (PUI) sustained minor injuries. The airplane sustained substantial damage to the tail and fuselage. The local instructional flight departed Chino, California, about 0900. Visual meteorological conditions prevailed, and no flight plan had been filed. The instructor pilot reported that while returning to the airport the engine started running rough and losing power followed by a total loss of engine power. The instructor landed the airplane on a golf course fairway at the Cresta Verde Golf Course. During the landing roll, the airplane went into a sand trap and nosed over. During the recovery, it was noted that a large amount of oil was covering the underside of the airplane. A preliminary examination revealed a broken engine oil return line. On January 4, 2011, a post accident examination by Federal Aviation Administration inspectors revealed that the oil pressure line had failed at the nipple just aft of the b-nut. There were wear marks or chaffing marks on a metal sleeve, which is just aft of the b-nut prior to the flexible outer material. It was determined that these chaff marks were the result of rubbing against the bottom side of the engine load mount assembly. The undamaged end of the oil line was reinstalled on the fitting at the engine, and there was visible clearance between the hose assembly and the engine mount in the static condition. Review of the airplane’s maintenance records showed that the last time this engine was removed for overhaul was in 2003, and it had annual inspections every year since then. There was no record of this hose assembly having ever been inspected since overhaul. The failed component, MS24588 nipple, fractured circumferentially at the smallest (0.019"sq) cross sectional area of the part. There was no evidence of Service Difficulty Reports (SDR), Metadata Repository Report (MDR), or Special Airworthiness Information Bulletins (SAIB) history with this part. ## Aircraft - Registration: [N11858](https://openairdocs.org/deregistered/N11858-2017-09-20), registration cancelled 2017-09-20, S/N 296-72, built 1972 (OpenAirDocs) - Reported make and model: BELLANCA 7KCAB - Registry model: [Bellanca 7KCAB](https://openairdocs.org/model/bellanca-7kcab) (registry code 1220701) (OpenAirDocs) - Registry engine: [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series) (registry code 41509, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 296-72 - Airframe hours: 2287 - Engines: LYCOMING IO-320 SERIES 150 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Alliance International Aviation - Registered owner: Teifke Daniel L - Airworthiness certificate: Standard, Aerobatic; Standard, Normal - Last inspection: Annual, November 10, 2010, 2 hours before - Departed: CNO, Chino, CA - Destination: CNO, Chino, CA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 63; injuries: none; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; medical: class 2, with waivers/limitations; last flight review August 4, 2010; seat: rear; flight hours: 8,374 total, 26 in this make and model, 7,235 as pilot in command, 17 in the last 90 days, 12 in the last 30 days, 1 in the last 24 hours - Pilot; age 73; commercial; airplane ratings: single-engine land; seat: front; flight hours: 650 total, 2 in this make and model, 610 as pilot in command, 14 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 27 °F - Altimeter: 30.09 inHg - Observed at: AJO, 3 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20101202053419A](https://openairdocs.org/incident/20101202053419A), Dec 2, 2010: Bellanca 7KCAB, Corona, CA, Substantial damage. Inflight engine failure followed by emergency landing on golf course. Acft entered sand trap on rollout and nosed over, coming to rest inverted. Firewall and… ## Docket (4 files) The files NTSB released with the investigation on June 20, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=77928. 3.2 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40370024&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Photo 1 - Broken Oil Line Fitting (item 2, .PDF, 2.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40370025&FileExtension=.PDF&FileName=Photo%201%20-%20Broken%20Oil%20Line%20Fitting-Master.PDF - Photo 2 - Accident Airplane Nosed Over (item 3, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40370027&FileExtension=.PDF&FileName=Photo%202%20-%20Accident%20Airplane%20Nosed%20Over-Master.PDF - FAA Inspector Examination Comments (item 4, .PDF, 106 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40370028&FileExtension=.PDF&FileName=FAA%20Inspector%20Examination%20Comments-Redacted.PDF From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.