# Service difficulty reports that cite it: Boeing SB 747-53-2112

A list on [Boeing SB 747-53-2112](https://openairdocs.org/service-documents/boeing/sb-747-53-2112.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 UPS00434011](https://openairdocs.org/sdr/UPS00434011.md): Doubler · Boeing 747121 · Jul 24, 2000 · N691UP · Revision R3
  > INSPECTION TYPE:C, NLG CRACK FOUND ON THE FWD LOWER CORNER STRUCTURE OF THE WHEEL WELL LT SIDE. CRACK EXTENDS UNDER THE LOWER CHORD OF THE BULKHEAD. CRACKS ARE PERMITTED IAW SB 747-53-2112 R3 IN UNDER
- [SDR EIAA2000118](https://openairdocs.org/sdr/EIAA2000118.md): Structure · Boeing 747212B · Apr 21, 2000 · N482EV · No revision named
  > HAECO-HKG - C6/D-CHECK/PLY MOD - NLG W/W FORWARD LT CORNER STRUCTURE AT STA 240 LBL 33 AREA CANTED BULKHEAD CHORD UPPER FLANGE CRACKED BY 1.25 INCHES RUNNING UPWARDS. REPAIRED NLG W/W LT FORWARD CORNE
- [SDR P5CA9800967](https://openairdocs.org/sdr/P5CA9800967.md): Bulkhead · Boeing 747122 · Apr 27, 1998 · N851FT · No revision named
  > LEFT AND RIGHT NLG WHEEL WELL FORWARD CORNERS CANTED BULKHEAD AND SIDEWALL LOWER CHORD FOUND CRACKED. REPAIRED AS PER SB 747-53-2112.
- [SDR 95UAL900122](https://openairdocs.org/sdr/95UAL900122.md): Doublers · Boeing 747238B · Sep 7, 1995 · N161UA · No revision named
  > THE 65B00283-1, 65B00283-2 DOUBLERS WERE FOUND TO HAVE CRACKS EMANATING FROM THE INBOARD EDGE. THE DOUBLERS WERE PREVIOUSLY INSTALLED BY THE PRIOR OWNER. UAL REPLACED DOUBLERS AND REINFORCED AREA PER

## 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 = 'boeing/sb-747-53-2112' 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/boeing/sb-747-53-2112/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.