# Airworthiness directives, 1956

FAA airworthiness directives effective in 1956: 22 ADs with their full text, status and the aircraft they apply to.

- [AD 56-01-02](https://openairdocs.org/ad/56-01-02.md): Wing Spar Splice Bolt Holes · Aero Spacelines 377, 377MG and 377SGT · Published Dec 4, 1956
- [AD 55-22-03](https://openairdocs.org/ad/55-22-03.md): Fuel Tank Cap · Piper PA-22 · Published Dec 4, 1956
- [AD 55-21-02](https://openairdocs.org/ad/55-21-02.md): Front Wing Spar Attachment Fitting · Piper PA-23 · Published Dec 4, 1956
- [AD 55-14-02](https://openairdocs.org/ad/55-14-02.md): Hydraulic Cylinder Replacement · Piper PA-23 · Published Dec 4, 1956
- [AD 55-13-01](https://openairdocs.org/ad/55-13-01.md): Idler Bellcrank Installation · Piper PA-23 · Published Dec 4, 1956
- [AD 55-11-02](https://openairdocs.org/ad/55-11-02.md): Thermal Relief Valves · Piper PA-23 · Published Dec 4, 1956
- [AD 55-09-01](https://openairdocs.org/ad/55-09-01.md): Magnetic Circuit Breaker · Aero Spacelines 377, 377MG and 377SGT · Published Dec 4, 1956
- [AD 55-08-04](https://openairdocs.org/ad/55-08-04.md): Ignition Filter Replacement · Piper PA-22 · Published Dec 4, 1956
- [AD 55-07-02](https://openairdocs.org/ad/55-07-02.md): Landing Gear Tube Reinforcement · Piper PA-22 · Published Dec 4, 1956
- [AD 54-26-02](https://openairdocs.org/ad/54-26-02.md): Control cable fraying · Univair 415-C, 415-CD, 415-D and 2 more · Published Dec 4, 1956
- [AD 54-19-01](https://openairdocs.org/ad/54-19-01.md): Brake Line Cover Plate · Piper PA-18A · Published Dec 4, 1956
- [AD 54-02-02](https://openairdocs.org/ad/54-02-02.md): Wheel Skis · Cessna 170, 170A, 170B and 2 more · Published Dec 4, 1956
- [AD 53-24-04](https://openairdocs.org/ad/53-24-04.md): Fuel-Hydraulic Lines · Piper PA-18, PA-20 and PA-22 · Published Dec 4, 1956
- [AD 53-05-01](https://openairdocs.org/ad/53-05-01.md): Propellers Slip Rings · Aero Spacelines 377, 377MG, 377SGT and 6 more · Published Dec 4, 1956
- [AD 53-04-01](https://openairdocs.org/ad/53-04-01.md): Control Stick Attachment · Piper PA-18, PA-18-105 (Special), PA-18-125 (Army L-21A) and 16 more · Published Dec 4, 1956
- [AD 52-15-01](https://openairdocs.org/ad/52-15-01.md): Reversing Solenoid Circuits · Aero Spacelines 377, 377MG and 377SGT · Published Dec 4, 1956
- [AD 52-12-01](https://openairdocs.org/ad/52-12-01.md): Compressor Motors · Aero Spacelines 377, 377MG and 377SGT · Published Dec 4, 1956
- [AD 52-07-03](https://openairdocs.org/ad/52-07-03.md): Lift Strut Rework · Piper J-3, J3C-40, J3C-50 and 15 more · Published Dec 4, 1956
- [AD 51-27-03](https://openairdocs.org/ad/51-27-03.md): Nose Wheel Drain · Piper PA-22 · Published Dec 4, 1956
- [AD 51-27-02](https://openairdocs.org/ad/51-27-02.md): Wheel Assemblies · Aero Spacelines 377, 377MG and 377SGT · Published Dec 4, 1956
- [AD 51-23-03](https://openairdocs.org/ad/51-23-03.md): Battery Box Insulation · Piper PA-16, PA-20 and PA-22 · Published Dec 4, 1956
- [AD 51-19-02](https://openairdocs.org/ad/51-19-02.md): Oil Radiator Hose · Piper PA-18, PA-20 and PA-22 · Published Dec 4, 1956

## The whole list in SQL

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

```sql
SELECT d.ad_number, d.status, d.subject, d.makes, d.models, d.effective_date
FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
WHERE year(coalesce(d.effective_date, d.publication_date, d.issue_date)) = 1956
ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC
```

This list as a web page: https://openairdocs.org/ad?year=1956

---
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.