# Service difficulty reports that cite it: Continental SB 639

A list on [Continental SB 639](https://openairdocs.org/service-documents/continental/sb-639.md).

Newest first, with the revision each cites, as OpenAirDocs read it from the records’ text. OpenAirDocs read these citations from the records’ text, so one can be misread: check it against the record. A newer revision may exist that no record cites.

- [SDR 95ZZZX1289](https://openairdocs.org/sdr/95ZZZX1289.md): Cam Assy · Cessna 172 · Mar 2, 1995 · No revision named
  > MAGNETO WAS OVERHAULED AND IMPULSE COUPLING WAS THE NEW SNAP RING TYPE AS SPECIFIED IN TCM MSB NR 645. MAG WAS INSTALLED ON ENGINE. ENGINE FIRED SEVERAL TIMES, BUT DID NOT START. THEN ENGINE WOULD NOT
- [SDR 95ZZZX1290](https://openairdocs.org/sdr/95ZZZX1290.md): Cam Assy · Mar 2, 1995 · No revision named
  > MAGNETO WAS DISASSEMBLED FOR OVERHAUL. PREVIOUSLY, HAD NEW SNAP RING IMPULSE COUPLING INSTALLED. COUPLING CAM ASSY APPEARED TO BE IN GOOD CONDITION AND LOW TIME. CAM ASSY WAS INSPECTED IAW TCM MSB NR
- [SDR 95ZZZX956](https://openairdocs.org/sdr/95ZZZX956.md): Impulse Coupling · Beech F35 · Jan 20, 1995 · N3376C · No revision named
  > DURING INSPECTION OF IMPULSE COUPLING, I.E., AD 78-09-07R3, NUT WAS LOOSE DUE TO CRACK IN BORE OF IMPULSE COUPLING. TCM BENDIX SB 639 REFERS TO INSTALLATION OF COUPLINGS. AD 78-09-07R3 DOES NOT REQUIR

## The whole list in SQL

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

```sql
SELECT s.sdr_id, s.difficulty_date, s.aircraft_make, s.aircraft_model, s.part_name, string_agg(DISTINCT c.revision, ', ' ORDER BY c.revision) AS revisions,
  bool_or(c.incorporated_by_reference) AS incorporated_by_reference, bool_or(c.in_regulatory_text) AS in_regulatory_text
FROM 'https://openairdocs.org/data/latest/service_document_citation.parquet' c JOIN 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' s ON s.sdr_id = c.record_id
WHERE c.document_id = 'continental/sb-639' AND c.record_type = 'faa_service_difficulty_report'
GROUP BY ALL
ORDER BY max(c.record_date) DESC
```

This list as a web page: https://openairdocs.org/service-documents/continental/sb-639/reports

---
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, except the copies of manufacturers’ service documents, which belong to their rights holders.