# Service difficulty reports: N7780B

A list on [N7780B](https://openairdocs.org/aircraft/N7780B.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR FXGA201408141429](https://openairdocs.org/sdr/FXGA201408141429.md): Skin · cracked · Aug 13, 2014 · N7780B · Doug DC6A · Wing, Plate/Skin
  > REPAIR CRACK IN THE UPPER WING SKIN AT WSTA 111 STRINGER 10R. STOP DRILL CRACK & INSTALL AN EXTERNAL DOUBLER MADE FROM 7075-T6 0.080 IAW DWG 1429-01 & DC-6 A & B OVERHAUL MANUAL FIGURE 13-30.
- [SDR 2008F00013](https://openairdocs.org/sdr/2008F00013.md): Trim Tab · binding · Apr 7, 2008 · N7780B · Doug DC6A · Aileron Tab Control System
  > AILERONS BINDING ON TAKEOFF AFTER GEAR RETRACTION (BEFORE TAKEOFF CONTROL CHECK) NORMAL. FOUND THAT THE AILERON SPRING TAB MECHANISM WAS BINDING PREVENTING MOVEMENT OF THE TAB SYSTEM WHICH IN TURN INCREASED THE FORCES REQUIRED TO MOVE THE AILERONS.
- [SDR NAFA20040005](https://openairdocs.org/sdr/NAFA20040005.md): Relay · malfunctioned · Nov 17, 2004 · N7780B · Doug DC6A · Propeller Indication System
  > TAKEOFF WARNING HORN INTERMITTENT ON TAKEOFF. REPLACED NR 4 PROPELLER TAKEOFF WARNING RELAY. OP CHECKED GOOD.
- [SDR NAFA200400004](https://openairdocs.org/sdr/NAFA200400004.md): Spark Plug · shorted · Mar 26, 2004 · N7780B · Doug DC6A · Spark Plug/Igniter
  > NR 1 ENGINE FEATHERED DUE TO NR 11 CYLINDER DOUBLE SHORTED SECONDARY. REPLACED BOTH FRONT AND REAR SPARK PLUGS ON NR 11 CYLINDER. CHECKED GOOD.
- [SDR NAFA20040003](https://openairdocs.org/sdr/NAFA20040003.md): Magneto · shorted · Mar 17, 2004 · N7780B · Doug DC6A · Magneto/Distributor
  > NR 2 ENGINE PRECAUTIONARY SHUT DOWN DUE TO LOSS OF LEFT DISTRIBUTOR. REPLACED NR 2 ENGINE MAGNETO. CHECK GOOD.
- [SDR NAFA20040002](https://openairdocs.org/sdr/NAFA20040002.md): Downlock Switch · dirty · Mar 4, 2004 · N7780B · Doug DC6A · Landing Gear Position and Warning
  > UNSAFE NOSE WHEEL INDICATION. REMOVED NOSE GEAR DOWN & LOCK SWITCH ASSEMBLY, CLEANED CONTACTS, REASSEMBLED, RIGGED AND SWUNG NOSE GEAR. OP CHECK GOOD. (CLEANED INSPECTION WINDOW).
- [SDR NAFA20040001](https://openairdocs.org/sdr/NAFA20040001.md): Pushrod · bent · Feb 28, 2004 · N7780B · Doug DC6A · Reciprocating Engine Cylinder Section
  > NR 3 ENGINE PRECAUTIONARY SHUT DOWN DUE TO NR 3 CYLINDER DOUBLE SHORTED SECONDARY. REPLACED BOTH INTAKE AND EXHAUST PUSH RODS AND ADJUSTED VALVES. OP CHECKED GOOD.
- [SDR NAFA20030003](https://openairdocs.org/sdr/NAFA20030003.md): Engine · overspeed · Dec 5, 2003 · N7780B · Doug DC6A · Engine (Reciprocating)
  > NR 2 ENGINE RUNNING ROUGH AND LOOSING OIL. ENGINE/PROP OVERSPEED 3500 RPM. REPLACED NR 2 ENGINE.
- [SDR NAFA20030002](https://openairdocs.org/sdr/NAFA20030002.md): Spark Plug · cracked · Oct 9, 2003 · N7780B · Doug DC6A · Spark Plug/Igniter
  > NR 1 PRECAUTIONARY ENGINE SHUT DOWN DUE TO NR 16 CYLINDER DOUBLE SHORTED SECONDARY. REMOVED AND REPLACED NR 16 CYLINDER FRONT AND REAR SPARK PLUGS. CHECKED GOOD.
- [SDR NAFA20030001](https://openairdocs.org/sdr/NAFA20030001.md): Spark Plug · overheated · Mar 21, 2003 · N7780B · Doug DC6A · Spark Plug/Igniter
  > NR 4 ENGINE SHUT DOWN DUE TO BACK FIRING. REPLACED NR 18 CYLINDER FRONT AND REAR SPARK PLUGS.
- [SDR NAFA2002001](https://openairdocs.org/sdr/NAFA2002001.md): Cylinder · cracked · Dec 5, 2002 · N7780B · Doug DC6 · Reciprocating Engine Cylinder Section
  > NR 3 ENGINE PRECAUTIONARY SHUT DOWN FOR A NR 2 CYLINDER SHORTED SECONDARY. REPLACED NR 2 CYLINDER.
- [SDR NAFA20020003](https://openairdocs.org/sdr/NAFA20020003.md): Skin · cracked · Mar 13, 2002 · N7780B · Doug DC6A · Fuselage Main, Plate/Skin
  > TOP OF FUSELAGE STA 640, LAP SEAM CORRODED AND SKIN CRACKED BETWEEN L-4 AND L5. REMOVED CORRODED AND DAMAGED AREA. FABRICATED AND INSTALLED FILLER AND DOUBLER PER NAC DRAWING NAC011 REV 32.
- [SDR NAFA20020002](https://openairdocs.org/sdr/NAFA20020002.md): Cap · cracked · Mar 13, 2002 · N7780B · Doug DC6A · Wing Miscellaneous Structure
  > RIGHT WING NR 23 STRINGER CAP CRACKED AT STA 325. FABRICATED AND INSTALLED 2 DOUBLERS PER DRAWING NAC2002-02.
- [SDR NAFA20020001](https://openairdocs.org/sdr/NAFA20020001.md): Spark Plug · shorted · Mar 11, 2002 · N7780B · Doug DC6A · Spark Plug/Igniter
  > PRECAUTIONARY SHUT DOWN NR 2 ENGINE, DUE TO BACKFIRING. NR 16 CYLINDER LEFT A LONG RESISTANCE PATTERN, RIGHT SHORTED SECONDARY. INSPECTED THE NR 16 CYLINDER, REPLACED LEFT AND RIGHT SPARK PLUGS AND SHORT LEADS.
- [SDR NAFA20010004](https://openairdocs.org/sdr/NAFA20010004.md): Heater · malfunctioned · Nov 27, 2001 · N7780B · Doug DC6A · Heating System
  > STRONG EXHAUST ODOR IN COCKPIT, CO² DETECTOR TURNING BLACK. INSPECTED CABIN HEATER, NO DEFECTS NOTED. REPLACED CO² DETECTOR, AND OPERATED CABIN HEATER FOR 1 HOUR, NO EXHAUST ODOR NOTED. CO² DETECTOR REMAINED CLEAR, OK FOR SERVICE.
- [SDR N32B2001004](https://openairdocs.org/sdr/N32B2001004.md): Stringer · cracked · Sep 10, 2001 · N7780B · Doug DC6A · Wing, Longeron/Stringer
  > STRINGER 17 CRACKED AT WING, STA 140. REPAIRED 17 AT WING STA L40 IAW NAC 2001-05.
- [SDR NAFA20010003](https://openairdocs.org/sdr/NAFA20010003.md): Stringer · cracked · Sep 10, 2001 · N7780B · Doug DC6A · Wing, Longeron/Stringer
  > STRINGER 17 CRACKED AT WING STA L40. REPAIRED STRINGER 17 AT WING STA L40 IAW NAC 2001-05.
- [SDR NAFA20010002](https://openairdocs.org/sdr/NAFA20010002.md): Cylinder · cracked · Jul 23, 2001 · N7780B · Doug DC6A · Reciprocating Engine Cylinder Section
  > NR 4 ENGINE RUNS ROUGH AND ANALYZER SHOWED LOW COMPRESSION. REPLACED NR 3 CYLINDER.
- [SDR NAFA20010001](https://openairdocs.org/sdr/NAFA20010001.md): Cylinder · damaged · Jul 9, 2001 · N7780B · Doug DC6A · Reciprocating Engine Cylinder Section
  > NR 3 ENGINE NR 13 CYLINDER LT & RT NO COMBUSTION PATTERN ON ANALYZER. REMOVED AND REPLACED THE NR 13 CYLINDER.
- [SDR 2001F00115](https://openairdocs.org/sdr/2001F00115.md): Cylinder · cracked · Jul 2, 2001 · N7780B · Doug DC6A · Reciprocating Engine Cylinder Section
  > PRECAUTIONARY SHUTDOWN NR 1 ENGINE DUE TO RUNNING ROUGH AT 2340Z. NR 13 CYLINDER HEAD CRACKED, REPLACED CYLINDER. (M)
- [SDR N32B2001002](https://openairdocs.org/sdr/N32B2001002.md): Cylinder · cracked · May 23, 2001 · N7780B · Doug DC6A · Reciprocating Engine Cylinder Section
  > NR 3 ENGINE FEATHERED AT 00172, DUE TO RUNNING ROUGH.
- [SDR NACA200000011](https://openairdocs.org/sdr/NACA200000011.md): Cylinder · cracked · Jun 14, 2000 · N7780B · Doug DC6A · Reciprocating Engine Cylinder Section
  > VIBRATION AND BMEP DROP ON NR 2 ENGINE AFTER REDUCTION TO BMEP. REPLACED NR 17CYLINDER, NR 2 ENGINE DUE TO CRACKED HEAD.

## 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 n_number = 'N7780B' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N7780B/reports

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