# Service difficulty reports: Com-Jet, LLC.

A list on [Com-Jet, LLC.](https://openairdocs.org/faa-repair-station/DM4R133M/com-jet-llc.md).

Reports filed under designator DM4R by a repair station, newest first.

- [SDR 98ZZZX2705](https://openairdocs.org/sdr/98ZZZX2705.md): Side Brace · cracked · Jun 18, 1998 · Doug DC9 · Landing Gear Retraction/Extension System
  > A CRACK WAS FOUND AT THE SHANK END APPROXIMATELY 90 DEGREES FROM THE MLG. THE CRACK WAS 1 INCH LONG AND.015 INCH DEEP. FIXED SIDE BRACE ATTACHES TO THE MAIN LANDING GEAR SIDE BRACE.
- [SDR 98ZZZX2205](https://openairdocs.org/sdr/98ZZZX2205.md): Diaphragm · deteriorated · Jun 3, 1998 · Doug DC8* · Hydraulic Reservoir, Auxiliary
  > AUXILIARY HYDRAULIC POWER SURGE DAMPER ACCUMULATOR TANK HAD NEW DIAPHRAGM INSTALLED IN NOVEMBER, 1997. UNIT INSTALLED IN ACFT FOR 15 DAYS AND REMOVED FOR LEAKAGE. FOUND DIAPHRAGM DETERIORATED AND TORN ON LIP. SUBMITTER STATED THIS IS THE 6TH FAILURE OF THIS
- [SDR 98ZZZX2026](https://openairdocs.org/sdr/98ZZZX2026.md): Diaphragm · torn · May 13, 1998 · N801CK · Doug DC8F55 · Hydraulic Accumulator, Auxiliary
  > AUXILIARY HYDRAULIC POWER SURGE DAMPER ACCUMULATOR TANK HAD NEW DIAPHRAGM INSTALLED AT REPAIR. DIAPHRAGM FAILED (TORN) AFTER 3 MONTHS TIME IN SERVICE. DIAPHRAGM MANUFACTURED BY KAPCO. THIS IS THE 5TH IDENTIFIED FAILURE BY THIS REPAIR STATION.
- [SDR 98ZZZX1381](https://openairdocs.org/sdr/98ZZZX1381.md): End Barrel · cracked · Mar 23, 1998 · Doug DC863 · Steering Unit
  > END BARREL (CAP) HAS TWO LARGE CRACKS (APPROXIMATELY 1.50 INCH LONG) PER INDICATOR TO THREADS. CRACKS ARE 180 DEGREES FROM EACH OTHER. END BARREL WAS MANUFACTURED BY AV-MAT FAA-PMA PART.
- [SDR 98ZZZX844](https://openairdocs.org/sdr/98ZZZX844.md): Valve Body · cracked · Feb 11, 1998 · Doug DC10* · Leading Edge Slat Control System
  > HAD SEVERAL INSTANCES WHERE FLIGHT CONTROL VALVE BODY WAS CRACKED. CRACK IS LOCATED IN THREAD RELIEF AREA.
- [SDR 98ZZZX311](https://openairdocs.org/sdr/98ZZZX311.md): Support Assy · cracked · Jan 9, 1998 · Doug DC8* · Aileron Control System
  > INSPECTION FOUND THE AILERON CONTROL REVERSION ASSEMBLY HAS A CRACK ON BOTH SIDES OF THE SUPPORT ASSEMBLY.
- [SDR 98ZZZX287](https://openairdocs.org/sdr/98ZZZX287.md): Support Assy · cracked · Jan 9, 1998 · Doug DC8* · Aileron Control System
  > THE AILERON CONTROL REVERSION ASSEMBLY HAS A CRACK ON BOTH SIDES OF THE SUPPORT ASSEMBLIES.
- [SDR 97ZZZX4773](https://openairdocs.org/sdr/97ZZZX4773.md): Bearing · failed · Oct 31, 1997 · Boeing 737232 · Air Distribution Fan
  > FAN BEARING FAILED (BALL BEARING). BEARING CAME APART. ALSO, CAUSED DAMAGE TO END BELL 11840-1. 712.42 HOURS SINCE NEW PART WAS INSTALLED.
- [SDR 97ZZZX4772](https://openairdocs.org/sdr/97ZZZX4772.md): Bearing · failed · Oct 31, 1997 · Boeing 727232 · Air Distribution Fan
  > FAN BALL BEARING STARTING TO COME APART. PARTIAL FAILURE OF BEARING. 712.42 HOURS SINCE NEW PART INSTALLED.
- [SDR 97ZZZX4771](https://openairdocs.org/sdr/97ZZZX4771.md): Manifold · chafed · Oct 31, 1997 · Boeing 7373T0 · Shimmy Damper
  > INSPECTION FOUND MANIFOLD ASSY OF DAMPER ASSY CHAFED DUE TO HOSE RUBBING ON OUTSIDE DIAMETER OF COMPENSATOR LOCATION. REPEAT DEFECT.
- [SDR 97ZZZX4649](https://openairdocs.org/sdr/97ZZZX4649.md): Acme Nut · failed · Oct 24, 1997 · N508DC · Doug DC851 · Stabilizer Control System
  > ACME NUT THREADS STRIPPED MAKING LONGITUDINAL TRIM MECHANISM DRIVE UNIT TOTALLY INOPERABLE. THIS NUT DRIVES THE JACKSCEW UP OR DOWN. THE INSIDE DIAMETER IS TOTALLY STRIPPED WHICH WILL NOT ALLOW ANY MOVEMENT OF THE JACKSCREW. THERE ARE TWO JACKSCREWS PER AIR
- [SDR 97ZZZX3907](https://openairdocs.org/sdr/97ZZZX3907.md): Resistor · failed · Aug 27, 1997 · Doug DC10* · DC Regulator
  > RESISTORS FAILED CAUSING CSD LOAD CONTROLLER TO FAIL AND MAINTAIN PROPER CYCLES. THIS IS THE SECOND TYPE OF THIS FAILURE. ORIGINAL PARTS CAME FROM MANUFACTURER.
- [SDR 97ZZZX3906](https://openairdocs.org/sdr/97ZZZX3906.md): Resistor · failed · Aug 27, 1997 · Doug DC10* · DC Regulator
  > RESISTORS FAILED CAUSING CSD LOAD CONTROLLER TO FAIL AND MAINTAIN PROPER CYCLES. THIS IS THE SECOND TYPE OF THIS FAILURE. ORIGINAL PARTS CAME FROM MANUFACTURER.
- [SDR 97ZZZX3497](https://openairdocs.org/sdr/97ZZZX3497.md): Diaphragm · torn · Jul 28, 1997 · Doug DC8* · Hydraulic Accumulator, Auxiliary
  > NEW BLADDER DIAPHRAGM INSTALLED IN ACCUMULATOR JULY, 1996. UNIT FAILED JULY, 1997. BLADDER TORN AND LEAKING. THIRD TYPE FAILURE SEEN WITH THIS PART NUMBERED BLADDER. BLADDER PMA PART FROM KAPCO (DOUGLAS LICENSEE).
- [SDR 97ZZZX1324](https://openairdocs.org/sdr/97ZZZX1324.md): Battery Pack · shorted · Mar 21, 1997 · Emergency Lighting
  > BATTERY PACK HAS SEVERAL SHORTED CELLS. BATTERY PACK WAS REPLACED NEW FROM MANUFACTURER ON 1-30-97. EMERGENCY LIGHTS CAME ON WITH SWITCH OFF.
- [SDR 97ZZZX1205](https://openairdocs.org/sdr/97ZZZX1205.md): Battery Pack · melted · Mar 13, 1997 · Emergency Lighting
  > BATTERY PACK MELTED AND DETERIORATED. BATTERY PACK WAS REPLACED NEW FROM MANUFACTURER 1-29-97. APPROXIMATELY 30 DAYS IN SERVICE.
- [SDR 97ZZZX1165](https://openairdocs.org/sdr/97ZZZX1165.md): Diaphragm · torn · Mar 10, 1997 · Doug DC8* · Hydraulic Accumulator, Auxiliary
  > AUXILIARY HYD POWER SURGE DAMPER ACCUMULATOR TANK HAD NEW DIAPHRAGM INSTALLED AT OVERHAUL. DIAPHRAGM FAILED (TORN) AFTER 2 MONTHS TIME IN SERVICE. DIAPHRAGM SEPARATES HYD FLUID AND AIR. THIS PART WAS OBTAINED FROM THE MANUFACTURER.
- [SDR 97ZZZX1164](https://openairdocs.org/sdr/97ZZZX1164.md): Diaphragm · torn · Mar 10, 1997 · Doug DC8* · Hydraulic Accumulator, Auxiliary
  > AUXILIARY HYD POWER SURGE DAMPER ACCUMULATOR TANK HAD NEW DIAPHRAGM INSTALLED AT OVERHAUL. DIAPHRAGM FAILED (TORN) AFTER 5 MONTHS TIME IN SERVICE. 2ND REPORT. THIS PART WAS OBTAINED FROM THE MANUFACTURER.
- [SDR 97ZZZX1132](https://openairdocs.org/sdr/97ZZZX1132.md): Spring · missing · Mar 3, 1997 · Boeing 727225 · Elevator Control System
  > UPON DISASSEMBLY OF ELEVATOR POWER CONTROL UNIT, IT WAS NOTED THAT THE CENTERING SPRING WAS MISSING. (NOT INSTALLED AT LAST REPAIR.) CUSTOMER REPORTED 'AIRPLANE PORPOISES IN A AND B MODE".
- [SDR 97ZZZX840](https://openairdocs.org/sdr/97ZZZX840.md): Barrel · broken · Feb 6, 1997 · Doug DC8* · Trailing Edge Flap Actuator
  > FLAP ACTUATOR CYLINDER BARREL RECEIVED BROKEN AT CRANK MOUNT BORE. SUSPECT CAUSE IS METAL FATIGUE DUE TO CORROSION.
- [SDR 97ZZZX582](https://openairdocs.org/sdr/97ZZZX582.md): Valve Body · cracked · Jan 15, 1997 · Boeing 727 · Landing Gear Retraction/Extension System
  > SEQUENCE VALVE BODY HAS FATIGUE CRACK NEAR PORT VC AND LEAKS WITH 2,500 PSI APPLIED. BODY IS ALUMINUM. CASTING UNIT HAS A TOTAL TIME OF 84,556.19 BUT UNKNOWN HOURS ON ACTUAL BODY.
- [SDR 96ZZZX6135](https://openairdocs.org/sdr/96ZZZX6135.md): End Cap · blew off · Dec 10, 1996 · Hydraulic Power Accumulator, Main
  > GAS END CAP BLEW OFF THE ASSY. DURING TEST, ON INSPECTION, FOUND PREVIOUS INTERNAL CRACK IN THE CIRCUMFERENCE ON THE I/D OF CAP. TEST BEING PERFORMED WAS PRELIMINARY BEFORE DISASSEMBLY.
- [SDR 96ZZZX5451](https://openairdocs.org/sdr/96ZZZX5451.md): Bellcrank · broken · Oct 21, 1996 · Doug DC8* · Trailing Edge Flap Control System
  > BELLCRANK ARRIVED BROKEN. SUSPECT CAUSE WAS STRESS AND CORROSION.
- [SDR 96ZZZX5466](https://openairdocs.org/sdr/96ZZZX5466.md): Bearing · failed · Oct 17, 1996 · Boeing 727 · Air Distribution Fan
  > AVIONIC COOLING FAN BEARING FAILED AFTER 1,571.22 HRS OF OPERATION. INNER BALL RACE DISTORTED AND BALLS MISSING. FLIGHT ATTENDANTS REPORTED SMOKE IN CABIN DUE TO FAN FAILURE.
- [SDR 97ZZZX811](https://openairdocs.org/sdr/97ZZZX811.md): Bearing · failed · Oct 16, 1996 · Doug DC983 · Air Distribution Fan
  > FAN BEARING FAILED. BEARING INNER RACE IS BLUE FROM HEAT. BEARING WILL NOT TURN. BEARING TT SINCE INSTALLATION 2127 HRS. FAN IS FOR AVIONIC COOLING AND CARGO HEAT. BEARING INSTALLED NEW.
- [SDR 96ZZZX5321](https://openairdocs.org/sdr/96ZZZX5321.md): Input Gear · binding · Oct 7, 1996 · Boeing 737* · Fuel Selector/Shut-Off Valve
  > FUEL SHUTOFF ACTUATOR ASSY WOULD STALL WITH A SLIGHT INWARD PRESSURE ON OUTPUT SHAFT. RECENTLY OVERHAULED BY ANOTHER REPAIR STATION (6-20-96). IMPROPER SHIMMING OF ARMATURE ASSY CAUSED INPUT GEAR TO RUB AGAINST ARMATURE SHAFT, ALSO, EXCESSIVE PLAY AT OUTPUT
- [SDR 96ZZZX4631](https://openairdocs.org/sdr/96ZZZX4631.md): End Bell · worn · Aug 27, 1996 · Boeing 727 · Air Distribution Fan
  > FAN END BELL BEARING BORE WORN OVERSIZE AFTER 545.5 HOURS OF OPERATION.
- [SDR 96ZZZX4714](https://openairdocs.org/sdr/96ZZZX4714.md): Body · corrosion · Aug 26, 1996 · Lkheed 1011* · Flight Control System
  > CONTROL SURFACE DAMPER'S ALUMINUM BODY HAS EXCESSIVE CORROSION IN THE INSIDE DIAMETER.
- [SDR 96ZZZX4164](https://openairdocs.org/sdr/96ZZZX4164.md): Bearing · failed · Aug 9, 1996 · Boeing 737210C · Air Distribution Fan
  > BEARING COMPLETELY DESTROYED. BEARING INSTALLED NEW AND FAILED AFTER 289.80 HOURS OF OPERATION. FAN TRIPPED CIRCUIT BREAKER, IMPELLER OF FAN RUBS ON FAN HOUSING.
- [SDR 96ZZZX4128](https://openairdocs.org/sdr/96ZZZX4128.md): Diaphragm · ruptured · Aug 8, 1996 · N8076U · Doug DC871F · Hydraulic Accumulator, Auxiliary
  > INSTALLED NEW DIAPHRAGM AND ACCUMULATOR INSTALLED IN AIRCRAFT 6-5-61. ACCUMULATOR REMOVED 7-25-96 FOR INTERNAL FAILURE. FOUND DIAPHRAGM RUPTURED AFTER 225 HOURS TIME IN SERVICE.
- [SDR 96ZZZX3387](https://openairdocs.org/sdr/96ZZZX3387.md): Seal Ring · failed · Jun 17, 1996 · Doug DC8* · Hydraulic System, Main
  > TEN EACH NEW SEALS WERE RECEIVED FROM THE AUTHORIZED DISTRIBUTOR FOR THE MANUFACTURER. THIS SEAL IS USED IN SKYDROL HYDRAULIC FLUID, BUT THE NEW SEALS FAILED UPON INSTALLATION (WOULD NOT SEAL). THE SEALS SWELL WHEN INTRODUCED TO SKYDROL FLUID. SUBMITTER STA
- [SDR 96ZZZX2504](https://openairdocs.org/sdr/96ZZZX2504.md): Crank Assy · broken · Apr 26, 1996 · Doug DC862 · Trailing Edge Flap Control System
  > FLAP CRANK ASSY IS BROKEN ON LUG AREA WHERE BOLT P/N NAS1105-23 GOES THROUGH. SUSPECT CAUSE, METAL FATIGUE AND CORROSION.
- [SDR 96ZZZX1632](https://openairdocs.org/sdr/96ZZZX1632.md): Crank · broken · Mar 15, 1996 · Doug DC861 · Trailing Edge Flap Control System
  > CRANK RECIEVED WITH BROKEN LINK MOUNT. SUSPECT DUE TO HIGH STRESS IN THIS AREA AS WELL AS POSSIBLE METAL FATIGUE.
- [SDR 96ZZZX1631](https://openairdocs.org/sdr/96ZZZX1631.md): Bearing · broken · Mar 15, 1996 · Doug DC862 · Trailing Edge Flap Actuator
  > BEARING ON FLAP ACTUATOR CYLINDER BARREL RECEIVED BROKEN. SUSPECT DUE TO HIGH STRESS IN THIS AREA AS WELL AS POSSIBLE METAL FATIGUE.

## 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 submitter_designator = 'DM4R' AND submitter_type_code = 'B'
ORDER BY difficulty_date DESC, sdr_id DESC
```

This list as a web page: https://openairdocs.org/faa-repair-station/DM4R133M/com-jet-llc/reports

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