Airworthiness directives, 1956

22 ADs took effect in 1956. Every AD since 1946 has a page with its text, status and the registered aircraft it may apply to.

Query with SQL
duckdb -csv -c "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"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

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