# Service difficulty reports: Cessna 170B

A list on [Cessna 170B](https://openairdocs.org/model/cessna-170b.md).

Newest first. General aviation reporting is voluntary.

- [SDR 2026FA0000662](https://openairdocs.org/sdr/2026FA0000662.md): Points · defective · Aug 23, 2026 · N2711C · Cessna 170B · Magneto/Distributor
  > THE ENGINE INTERMITTENTLY RAN ROUGH ON THE RIGHT MAG CHECK AND WOULD OCCASIONALLY COMPLETELY CUT OUT BUT THE EGT'S DIDN'T POINT TO ANY PARTICULAR CYLINDER. THE P LEADS AND IGNITION SWITCH TESTED GOOD. I REMOVED AND DISASSEMBLED THE RIGHT MAG. I FOUND THE RIVE
- [SDR 2017FA0000623](https://openairdocs.org/sdr/2017FA0000623.md): Universal Joint · separated · Dec 6, 2017 · N2766 · Cessna 170B · Control Column Section
  > UPON LANDING FLARE TO TOUCHDOWN AT 0C0, THE PILOT EXPERIENCED A COMPLETE LOSS OF FLIGHT CONTROLS. ONCE THE WHEELS CAME INTO CONTACT WITH THE RUNWAY, THE PILOT WAS ABLE TO REACH TO COPILOT SIDE YOKE FOR CONTROL. THERE WAS NO INJURIES OR DAMAGE TO THE AIRCRAFT.
- [SDR 2017FA0000355](https://openairdocs.org/sdr/2017FA0000355.md): Cylinder · failed · Aug 7, 2017 · N8170Q · Cessna 170B · Reciprocating Engine Cylinder Section
  > NUMBER 3 CYLINDER FAILED. IT CAME APART ABOUT 1 1/2 INCHES UP FROM THE BASE. CYLINDER WAS FIRST INSTALLED ON 6-9-1997 AND RECONDITIONED AT 495 HOURS ON 6/2000. IT HAD 1686 HOURS SINCE NEW WHEN IT FAILED 4/2016.
- [SDR 2015FA0000410](https://openairdocs.org/sdr/2015FA0000410.md): Clutch · failed · Aug 6, 2015 · N3413D · Cessna 170B · Engine Starter
  > STARTER CLUTCH LOCKED UP AND THEN FAILED. UPON REMOVAL OF THE STARTER ASSEMBLY, THE SMALLER DRIVE GEAR COMPLETELY DISINTEGRATED. THE GEAR PARTS FELL INTO THE ACCESSORY CASE. THE SCREENS SHOWED ALUMINUM CASTING PARTS AND GEAR PARTS. THE ENGINE DID NOT STOP
- [SDR CA141008017](https://openairdocs.org/sdr/CA141008017.md): Cylinder · cracked · Sep 11, 2014 · Cessna 170B · Reciprocating Engine Cylinder Section
  > (CAN) CYLINDER BARREL CRACK BETWEEN FIN 9& 10 70%. UNSCHEDULED LANDING. ENGINE SHUT DOWN. CYLINDER RETURNED TO MANUFACTURER FOR ASSESSMENT.
- [SDR CA120813027](https://openairdocs.org/sdr/CA120813027.md): Skin · buckled · Jul 21, 2012 · Cessna 170B · Fuselage Main, Plate/Skin
  > (CAN) THE INITIAL INSPECTION WAS CARRIED OUT TO INVESTIGATE BUCKLED AND DISTORTED FUSELAGE SKINS AT THE LOWER STRUT ATTACH POINT AFTER AN INNER TUBE FAILURE ON LANDING. FURTHER DETAILED INSPECTION REVEALED THAT THE FORWARD CARRY THROUGH SPAR NR 0511162-5 HAD
- [SDR 2012FA0000067](https://openairdocs.org/sdr/2012FA0000067.md): Attach Bolt · corroded · Jan 15, 2012 · N2768D · Cessna 170B · Fuselage, Wing Attach Fittings
  > DURING INSPECTION OF THE WING ATTACH BOLTS, THE HEADS AND NUTS WERE FOUND CORRODED. INSTALLED NEW BOLTS AND FOUND THAT THE REMOVED BOLTS HAD SOME CORROSION ON THE SHANK. 3 OF THESE BOLTS WERE SEVERELY CORRODED WITH MAJOR PITTING ON THE SHANKS. THESE BOLTS
- [SDR 2011FA0000507](https://openairdocs.org/sdr/2011FA0000507.md): Cylinder · broken · Aug 8, 2011 · N3598C · Cessna 170B · Reciprocating Engine Cylinder Section
  > FOUND METAL PARTICLES IN OIL SCREEN AT 30 HOURS AND AGAIN AT 74 HOURS. FOUND CYLINDERS COMING APART INSIDE BORE. PIECES MEASURED.4 X.3 INCHES.
- [SDR 2009FA0000738](https://openairdocs.org/sdr/2009FA0000738.md): Wheel · inoperative · Jul 14, 2009 · N1953A · Cessna 170B · Nose/Tail Landing Gear
  > DURING ANNUAL INSP IT WAS NOTED THAT THE TAILWHEEL COULD NOT BE STEERED. THE TAILWHEEL HAD BEEN PAINTED I THE PAST. THE GREASE FITTING ON TOP OF THE TAILWHEEL WAS COMPLETELY PAINTED. THE ACFT OWNER STATED THATA MECH WHOM HAD WORKED ON THE ACFT IN THE PAST
- [SDR 2007FA0000348](https://openairdocs.org/sdr/2007FA0000348.md): Line · chafed · Mar 30, 2007 · N4696C · Cessna 170B · Landing Gear Brake System
  > DURING AN ANNUAL INSPECTION, THE RT BRAKE SUPPLY LINE WAS FOUND CHAFED BY THE ELEVATOR CONTROL CABLE. THE CHAFING OCCURRED WHEN THE ELEVATOR IS OPERATED NEAR THE (UP) LIMIT OF TRAVEL. THE LOCATION OF CHAFE IS VIEWED DIRECTLY BELOW THE ELEVATOR TRIM WHEEL, LO
- [SDR 2007FA0000048](https://openairdocs.org/sdr/2007FA0000048.md): Stringer · cracked · Jan 5, 2007 · Cessna 170B · Wing, Longeron/Stringer
  > CRACKED AT FORWARD END AND PROGRESSES AFT. PROP STRIKE, OUT OF BALANCE PROP. (K)
- [SDR 2007FA0000047](https://openairdocs.org/sdr/2007FA0000047.md): Stringer · cracked · Jan 5, 2007 · N3436D · Cessna 170B · Wing, Longeron/Stringer
  > CRACKED AT FWD END AND PROGRESSES AFT. PROP STRIKE, OUT OF BALANCE PROP? AIRCRAFT HAS A HISTORY OF WING REPAIRS FROM GROUND LOOPS BUT HAS SINCE HAD A ENGINE UPGRADE TO MFG. (K)
- [SDR 2007FA0000046](https://openairdocs.org/sdr/2007FA0000046.md): Stringer · cracked · Jan 5, 2007 · N3436D · Cessna 170B · Wing, Longeron/Stringer
  > CRACKED AT FORWARD END AND PROGRESSES AFT. PROP STRIKE, OUT OF BALANCE PROP. EXAMPLE FROM C-170B WITH THE ENGINE INSTALLED. (K)
- [SDR 2005FA0000860](https://openairdocs.org/sdr/2005FA0000860.md): Cylinder · cracked · Jun 1, 2005 · N3167A · Cessna 170B · Landing Gear Brake System
  > STC SA13GL INSTALLATION. IN BOTH BRAKE ASSEMBLIES, 30-63A, THE 091-02200 CYLINDER ASSEMBLIES WERE FOUND TO BE CRACKED ACROSS AND PARALLEL TO THE 069-00400 ANCHOR BOLT HOLE. THIS IS THE SECOND AIRCRAFT, FOUND WITH CRACKS IN THE 091-02200 CYLINDER ASSEMBLIES.
- [SDR 2005FA0000364](https://openairdocs.org/sdr/2005FA0000364.md): Clamp · oversized · Jan 21, 2005 · N3167A · Cessna 170B · Engine Collector/Tailpipe/Nozzle
  > BOTH TAILPIPE/MUFFLER CONNECTIONS WERE FOUND TO BE OVERSIZED. THE EXHAUST PIPE CLAMPS WERE NOT OF SUFFICIENT STRENGTH TO SQUEEZE THE OVERSIZED PIPE DOWN ON THE MUFFLER EXHAUST TUBE. THE RESULTING LOOSE FIT WAS ALLOWING EXHAUST FUMES TO SHOOT INTO THE CABIN H
- [SDR CA040825001](https://openairdocs.org/sdr/CA040825001.md): Bracket · cracked · Aug 17, 2004 · Cessna 170B · Engine Mount Section
  > (CAN) CHANGED LT UPPER ENGINE RAIL BRACKET. PN 0411281-6 REPLACED WITH NEW PART. NEW HARDWARE USED.
- [SDR CA040825004](https://openairdocs.org/sdr/CA040825004.md): Bracket · cracked · Aug 5, 2004 · Cessna 170B · Elevator Structure
  > (CAN) ELEVATOR REMOVED TO CHANGE BRACKET. CHANGED LT ELEVATOR BRACKET. PN 051042 REPLACED WITH NEW PART. ADJACENT RIVETS REPLACED. REASSEMBLED AND DUAL INSPECTED.
- [SDR 2001FA0000672](https://openairdocs.org/sdr/2001FA0000672.md): Eyebolt · misinstalled · Nov 29, 2001 · N4669C · Cessna 170B · Fuselage Miscellaneous Structure
  > FLOAT EQUIPPED, LIFTING EYES WERE INSTALLED IN THE WRONG POSITION. RESULTING IN DRILLING THROUGH THE MAIN FORWARD WING SPAR AND LEAVING APPROXIMATELY EDGE DISTANCE. BETWEEN THE FORWARD SPAR ATTACH BOLT AND EDGE OF SPAR. (EYES SHOULD BE INSIDE CABIN TOP RIVET
- [SDR 2001FA0000493](https://openairdocs.org/sdr/2001FA0000493.md): Bulkhead · cracked · Oct 23, 2001 · N3511C · Cessna 170B · Fuselage Main, Bulkhead
  > BULKHEAD CRACKED AT LOWER RIGHT CORNER WHERE STEERING CABLE PULLEY BRACKET ATTACHES.
- [SDR ACE1016011](https://openairdocs.org/sdr/ACE1016011.md): Bracket · frozen · Oct 16, 2001 · N4632C · Cessna 170B · Rudder Control System
  > PILOT REPORTED RUDDER FROZEN IN FLT. UNEVENTFUL LANDING. MAINTENANCE INITIALLY CONFIRMED THE RUDDER COULD NOT BE MOVED, THEN IT FREED UP. REMOVED CARGO COMPARTMENT FLOOR AT CARGO DOOR AND OBSERVED WATER FROZEN AROUND RUDDER CABLE PULLEYS AT FUSELAGE STA 495
- [SDR 20010604CW006](https://openairdocs.org/sdr/20010604CW006.md): Spring · broken · May 14, 2001 · N3143A · Cessna 170B · Nose/Tail Landing Gear
  > TAILWHEEL SPRING BROKE AT AN EXISTING CRACK. TAILWHEEL THEN DAMAGED THE LOWER SKINS OF THE RUDDER.
- [SDR CA001102007](https://openairdocs.org/sdr/CA001102007.md): Spring · broken · Oct 2, 2000 · Cessna 170B · Nose/Tail Landing Gear Strut/Axle
  > (CAN) DURING LANDING ON A GRAVEL STRIP THE TAIL WHEEL SPRING BROKE. PILOT KEPT CONTROL OF THE PLANE AND HAD NO OTHER DAMAGE. THE LOWER SPRING LEAF (P.N. O542106) HAS BEEN FOUND BROKEN AT TWO PLACES. ALL (4) SPRING LEAVES HAVE BEEN REPLACED WITH NEW UNITS.
- [SDR 2000ZZZX845](https://openairdocs.org/sdr/2000ZZZX845.md): Bracket · broken · Mar 9, 2000 · N8156A · Cessna 170B · Engine Mount Section
  > BRACKET BROKEN AT THE EDGE OF THE STRAIGHT LINE OF BOLT PAD MACHINED SURFACE. SUBMITTER RECOMMENDED VISUAL INSPECTION EVERY 100 HOURS.
- [SDR CA000301011](https://openairdocs.org/sdr/CA000301011.md): Control Cable · frayed · Feb 15, 2000 · Cessna 170B · Rudder Control System
  > (CAN) DURING THE ANNUAL INSPECTION, THE RUDDER CABLES WERE FOUND CORRODED AND FRAYED WHERE THEY PASS THROUGH THE TAILCONE AREA. THE SUBMITTER STATES THAT THIS AREA IS DIFFICULT TO INSPECT THOROUGHLY WITHOUT DISASSEMBLY OF THE TAIL SECTION.
- [SDR CA000128053](https://openairdocs.org/sdr/CA000128053.md): Engine · seized · Jan 5, 2000 · Cessna 170B · Engine (Reciprocating)
  > (CAN) ENGINE LOST ITS OIL AND SEIZED. OPERATOR SPECIFIED FROZEN BREATHER AS THE CAUSE.
- [SDR AU000128053](https://openairdocs.org/sdr/AU000128053.md): Engine · seized · Jan 5, 2000 · Cessna 170B · Engine (Reciprocating)
  > (AU) ENGINE LOST ITS OIL AND SEIZED. OPERATOR SPECIFIED FROZEN BREATHER AS THE CAUSE.
- [SDR CA981006028](https://openairdocs.org/sdr/CA981006028.md): Pin · worn · Sep 22, 1998 · Cessna 170B · Reciprocating Engine Cylinder Section
  > (CAN) DURING MAINT TO CORRECT A ROUGH RUNNING ENGINE, OIL SCREEN CHECK INDICATED METAL CONTAMINATION. OIL CHANGE INITIATED, METAL CONTAMINATION CONFIRMED. INVEST FOUND CONTAMINATION CAME FROM COMPLETE FAILURE OF 2 PISTON PIN PLUGS AND EXCESSIVE WEAR OF REMAI
- [SDR 98ZZZX2283](https://openairdocs.org/sdr/98ZZZX2283.md): Selector · leaking · Jun 4, 1998 · N2993D · Cessna 170B · Fuel Selector/Shut-Off Valve
  > DURING THE ANNUAL INSPECTION, FOUND THE FUEL SELECTOR LEAKING. THE FUEL WAS LEAVING BEHIND A RED DYE. THIS AIRCRAFT IS APPROVED FOR AUTOFUEL PER AN STC.
- [SDR 98ZZZX1317](https://openairdocs.org/sdr/98ZZZX1317.md): Brakes · locked · Mar 1, 1998 · N4522C · Cessna 170B · Landing Gear Brake System
  > THE AIRCRAFT NOSED OVER ON LANDING CAUSED BY BOTH BRAKES BEING LOCKED ON TOUCHDOWN. PRIOR TO LANDING (SHORT FINAL) THE PILOT HAD TO USE FULL RUDDER DEFLECTION. WHEN THE AIRCRAFT TOUCHED DOWN THE AIRPLANE NOSED OVER. THE BRAKES WERE FOUND LOCKED, WHEN FULL R
- [SDR 97ZZZX3678](https://openairdocs.org/sdr/97ZZZX3678.md): Rod End · wrong bolts · Jun 11, 1997 · N2814C · Cessna 170B · Power Lever
  > AIRCRAFT WAS IN MAINTENANCE FOR CARBURETOR HEAT PROBLEM AND MECHANIC NOTED THAT AD 86-24-07 WAS NOT C/W. AIRCRAFT HAS BEEN MODIFIED WITH INSTALLATION OF 180 HP LYCOMING ENGINE IAW STC SA421CE AND SA749CE. AD 86-24-07 DOES NOT LIST 170B AS APPLICABLE. SE 79-
- [SDR 96ZZZX5426](https://openairdocs.org/sdr/96ZZZX5426.md): Skin · cracked · Sep 7, 1996 · N2269D · Cessna 170B · Fuselage Main, Plate/Skin
  > REAR BULKHEAD WAS FOUND CRACKED AT THE TAIL WHEEL MOUNTING SHEAR BRACKET. THE SKIN ON BOTH SIDES OF THE TAIL WHEEL MOUNTING BRACKET WERE FOUND CRACKED UPON DISASSEMBLY WITH CORROSION BETWEEN THE BRACKET AND SKIN. SUSPECT CAUSE WAS THE WEARING OF THE SKIN BY
- [SDR 96ZZZX5425](https://openairdocs.org/sdr/96ZZZX5425.md): Bulkhead · cracked · Sep 7, 1996 · N2269D · Cessna 170B · Fuselage Main, Bulkhead
  > REAR BULKHEAD WAS FOUND CRACKED AT THE TAIL WHEEL MOUNTING SHEAR BRACKET. THE SKIN ON BOTH SIDES OF THE TAIL WHEEL MOUNTING BRACKET WERE FOUND CRACKED UPON DISASSEMBLY WITH CORROSION BETWEEN THE BRACKET AND SKIN. SUSPECT CAUSE WAS THE WEARING OF THE SKIN BY
- [SDR 96ZZZX3385](https://openairdocs.org/sdr/96ZZZX3385.md): Skin · cracked · Jun 10, 1996 · N3487D · Cessna 170B · Fuselage Main, Plate/Skin
  > UPON INSPECTION, A 3 INCH CRACK WAS DISCOVERED AFT OF THE LEFT LANDING GEAR LEG ADJACENT TO THE GEARBOX. WAS DIFFICULT TO SEE, DUE TO CLOSE PROXIMITY TO OVERLAPPING EXTERIOR GEARBOX SKIN. WOULD RECOMMEND USE OF LIGHT BELOW FUSELAGE WHILE INSPECTING THROUGH C
- [SDR 96ZZZX1502](https://openairdocs.org/sdr/96ZZZX1502.md): Bracket Assy · bolt sheared · Mar 8, 1996 · N4387B · Cessna 170B · Nose/Tail Landing Gear Attach Section
  > BRACKET ASSY BOLT APPEARS AS METAL HAS CRYSTALLIZED THROUGH AGE. BOLT THEN SHEARED ALLOWING TAILWHEEL TO FALL OFF AIRCRAFT ON TAKEOFF.
- [SDR 96ZZZX1984](https://openairdocs.org/sdr/96ZZZX1984.md): Block · corroded · Mar 1, 1996 · N2364C · Cessna 170B · Wing, Fuselage Attach Fittings
  > SPAR BEARING BLOCK (FWD WING SPAR ATTACH POINT) FOUND SEVERELY CORRODED.
- [SDR 96ZZZX1266](https://openairdocs.org/sdr/96ZZZX1266.md): Bracket Assy · failed · Feb 6, 1996 · N4373B · Cessna 170B · Nose/Tail Landing Gear
  > WHILE REMOVING AIRCRAFT FROM HANGAR, TAIL WHEEL SWIVELED AND ASSY SEPARATED FROM BRACKET AND SPRING ASSY. AFTER INVESTIGATING, FOUND BOLT IN THE BRACKET ASSY WAS PARTLY FRACTURED AND THE SUDDEN JOLT FROM THE SWIVEL BROKE THE TAIL WHEEL ASSY OFF THE AIRCRAFT.
- [SDR 96ZZZX47](https://openairdocs.org/sdr/96ZZZX47.md): Bracket · cracked · Dec 16, 1995 · N4600C · Cessna 170B · Main Landing Gear Attach Section
  > UPON INSPECTION OF LANDING GEAR, LT SIDE DUE TO HARD LANDING, FOUND BRACKET CRACKED AND CORRODED BEYOND TREATMENT OR REPAIR. DUE TO CORROSION, RT SIDE WAS ALSO CORRODED BEYOND TREATMENT OR REPAIR. REPLACED BOTH LT AND RT SIDES. SUBMITTER RECOMMENDS INSTALLI
- [SDR 96ZZZX46](https://openairdocs.org/sdr/96ZZZX46.md): Bracket · cracked · Dec 16, 1995 · N4600C · Cessna 170B · Main Landing Gear Attach Section
  > UPON INSPECTION OF LANDING GEAR, LT SIDE DUE TO HARD LANDING, FOUND BRACKET CRACKED AND CORRODED BEYOND TREATMENT OR REPAIR. DUE TO CORROSION, RT SIDE WAS ALSO CORRODED BEYOND TREATMENT OR REPAIR. REPLACED BOTH LT AND RT SIDES. SUBMITTER RECOMMENDS INSTALLI
- [SDR 96ZZZX367](https://openairdocs.org/sdr/96ZZZX367.md): Bellcrank · worn · Dec 13, 1995 · N2799C · Cessna 170B · Rudder Control System
  > CHECKED PLAY IN RUDDER BOLT, FOUND HOLE WORN ALMOST THROUGH TOP OF BELLCRANK. HOLE CAUSED BY BEARING BLOCK. SUBMITTER STATED UNABLE TO INSPECT HOLE UNLESS BOLT AND WASHER ARE REMOVED.
- [SDR 95ZZZX5946](https://openairdocs.org/sdr/95ZZZX5946.md): Connecting Rod · broken · Sep 25, 1995 · N2209D · Cessna 170B · Reciprocating Engine Power Section
  > NR 6 CONNECTING ROD FRACTURED APPROXIMATELY 2 INCHES BELOW PISTON SKIRT. BREAK SHOWED EVIDENCE OF PROGRESSION OVER TIME. FINAL FRACTURE WAS APPROXIMATELY ONE-HALF THE DIAMETER OF THE ROD WITH SOME MINOR CORROSION EVIDENT ALONG THE BEGINNING OF THE CRACK. AR
- [SDR 95ZZZX5761](https://openairdocs.org/sdr/95ZZZX5761.md): Spar · corroded · Sep 11, 1995 · N3195A · Cessna 170B · Wing Spar
  > AIRCRAFT WAS IN FOR FIRST ANNUAL IN 8 YEARS. HEADLINER WAS TO BE REPLACED. UPON REMOVAL OF SUNVISORS AND HEADLINER, SEVERE CORROSION, EXCEEDING 10 PERCENT OF SPAR MATERIAL THICKNESS, WAS FOUND.
- [SDR 95ZZZX3471](https://openairdocs.org/sdr/95ZZZX3471.md): Cylinder · failed · Jun 26, 1995 · N3143A · Cessna 170B · Reciprocating Engine Cylinder Section
  > STUDENT PILOT REPORTED ENGINE RAN ROUGH ON RUN-UP. FOUND NR 3 EXHAUST VALVE STUCK OPEN. ALSO, FOUND INTAKE ROCKER ARM (WITH NO OIL ORIFICE) INSTALLED ONE EXHAUST SIDE - POSSIBLY CONTRIBUTING TO STUCK VALVE. SEE CONT SB M77-19. OTHER AIRCRAFT HAVE BEEN FOUN

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE aircraft_model_key = '170B'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/cessna-170b/reports

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