OpenAirDocs.org

20190703008889I

Incident · Minor damage
Open the Markdown

FAA incident report · Beech 58 · Englewood, CO · July 3, 2019

FAA Aviation Safety Information Portal

© OpenStreetMap
Date
July 3, 2019 · 11:43 local
Place
Englewood, CO
Phase of flight
Landing: Rollout
Operating rules
General operating rules (Part 91)
Damage
Minor damage
Aircraft
N9403Q
Reported as
Beech 58
Reported engine
Continental IO-520 series
People aboard
1
Fatal injuries
0
Other injuries
0
Pilot’s certificate
Airline transport
Pilot’s flight hours
14,460 total
N9403QRegistered now · Beech 58S/N TH-54 · Built 1970Airframe modelBeech 58Engine modelContinental IO-520 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

The aircraft had been at mountain air aviation at kbjc for 7 weeks for an annual inspection. Aircraft records show the annual was completed on June 18, 2019. The return to service was performed by gregory john boom, I.a. 333224. The PIC picked the aircraft up at 10:32 MDT for the first local flight out of annual inspection and performed local flights. The aircraft had been flown from the maintenance facility at kbjc to kapa June 26, 2019 by one of the other owners.

The PIC stated that he performed a normal pre-flight, run up, and departed kapa runway 28. The PIC performed a full stop landing at kapa runway 17L. The PIC departed kapa and flew to kbjc for 2 touch and go?s on runway 12R. The PIC then flew back to kapa for a full stop on runway 28. The PIC stated that the touchdown was normal and just before the distance markers. The PIC stated that once he started braking, he felt the whole aircraft shimmy. The PIC said that the shimmy felt like a flat tire. As the aircraft decelerated, the right hand gear collapsed. The aircraft slid off the runway between taxiways C3 and C2.

The collapsed gear resulted in damage to the right propeller, right main gear, right wing, flap assembly on the right side and the right main gear door.

After the aircraft was raised, it was noted that the right hand main tire did rotate freely. The tire was flat spotted to the tube.

Visual observations of the right main tire, wheel, and brake did not reveal any abnormal conditions in addition to the flat tire.

Subsequent inspection and teardown of the right hand main brake assembly found several issues. First, that an aluminum spacer installed between the caliper and backing plates is of a slightly greater thickness than the correct phenolic one per the ipc. Second, the excessive wear in the original caliper could have allowed the brake assembly to ?catch? On the guide pins allowing the pads to remain in pressure contact on the rotating disc building enough heat during normal landing operations to further decrease clearance from heat build up to the point of zero clearance or lock up of the brake.

As the FAA filed it

THE AIRCRAFT HAD BEEN AT MOUNTAIN AIR AVIATION AT KBJC FOR 7 WEEKS FOR AN ANNUAL INSPECTION. AIRCRAFT RECORDS SHOW THE ANNUAL WAS COMPLETED ON JUNE 18, 2019. THE RETURN TO SERVICE WAS PERFORMED BY GREGORY JOHN BOOM, I.A. 333224. THE PIC PICKED THE AIRCRAFT UP AT 10:32 MDT FOR THE FIRST LOCAL FLIGHT OUT OF ANNUAL INSPECTION AND PERFORMED LOCAL FLIGHTS. THE AIRCRAFT HAD BEEN FLOWN FROM THE MAINTENANCE FACILITY AT KBJC TO KAPA JUNE 26, 2019 BY ONE OF THE OTHER OWNERS.

THE PIC STATED THAT HE PERFORMED A NORMAL PRE-FLIGHT, RUN UP, AND DEPARTED KAPA RUNWAY 28. THE PIC PERFORMED A FULL STOP LANDING AT KAPA RUNWAY 17L. THE PIC DEPARTED KAPA AND FLEW TO KBJC FOR 2 TOUCH AND GO?S ON RUNWAY 12R. THE PIC THEN FLEW BACK TO KAPA FOR A FULL STOP ON RUNWAY 28. THE PIC STATED THAT THE TOUCHDOWN WAS NORMAL AND JUST BEFORE THE DISTANCE MARKERS. THE PIC STATED THAT ONCE HE STARTED BRAKING, HE FELT THE WHOLE AIRCRAFT SHIMMY. THE PIC SAID THAT THE SHIMMY FELT LIKE A FLAT TIRE. AS THE AIRCRAFT DECELERATED, THE RIGHT HAND GEAR COLLAPSED. THE AIRCRAFT SLID OFF THE RUNWAY BETWEEN TAXIWAYS C3 AND C2.

THE COLLAPSED GEAR RESULTED IN DAMAGE TO THE RIGHT PROPELLER, RIGHT MAIN GEAR, RIGHT WING, FLAP ASSEMBLY ON THE RIGHT SIDE AND THE RIGHT MAIN GEAR DOOR.

AFTER THE AIRCRAFT WAS RAISED, IT WAS NOTED THAT THE RIGHT HAND MAIN TIRE DID ROTATE FREELY. THE TIRE WAS FLAT SPOTTED TO THE TUBE.

VISUAL OBSERVATIONS OF THE RIGHT MAIN TIRE, WHEEL, AND BRAKE DID NOT REVEAL ANY ABNORMAL CONDITIONS IN ADDITION TO THE FLAT TIRE.

SUBSEQUENT INSPECTION AND TEARDOWN OF THE RIGHT HAND MAIN BRAKE ASSEMBLY FOUND SEVERAL ISSUES. FIRST, THAT AN ALUMINUM SPACER INSTALLED BETWEEN THE CALIPER AND BACKING PLATES IS OF A SLIGHTLY GREATER THICKNESS THAN THE CORRECT PHENOLIC ONE PER THE IPC. SECOND, THE EXCESSIVE WEAR IN THE ORIGINAL CALIPER COULD HAVE ALLOWED THE BRAKE ASSEMBLY TO ?CATCH? ON THE GUIDE PINS ALLOWING THE PADS TO REMAIN IN PRESSURE CONTACT ON THE ROTATING DISC BUILDING ENOUGH HEAT DURING NORMAL LANDING OPERATIONS TO FURTHER DECREASE CLEARANCE FROM HEAT BUILD UP TO THE POINT OF ZERO CLEARANCE OR LOCK UP OF THE BRAKE.