OpenAirDocs.org

AD 59-25-05

Open the Markdown

Airworthiness directive · Rudder reinforcement · Univair 415-C, 415-CD, 415-D and 3 more

FAA copy· 20 KB
Download from FAA DRS
AboutSource files 1
Published
December 10, 1959
Issued
December 3, 1959
Models
415-C, 415-CD, 415-D, F-1, 415-E, 415-G
Data sheets
TCDSA-787TCDSA-718
Registered aircraft
1,087 matched by model
Product
Aircraft · Small airplane

Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed November 21, 2025.

On this page

The airworthiness directive

59-25-05 FORNEY (ERCOUPE): Applies to All (Ercoupe) Forney Aircraft With Serial Numbers Up to 3,335 Inclusive. Compliance required by December 31, 1959, and thereafter every 100 hours of operation or periodic inspection, whichever occurs first. Fatigue failures have continued to occur in the rudder main rib where the control horn is attached after installation of reinforcement plates. Therefore, it is required that a visual inspection be made of the area around the rudder control horn for excessive deflection of the horn, canning of rudder skin, or any other unusual peculiarity which would indicate main rudder rib damage. If damage is evident, rudder rib Erco P/N 415-240 12 L/R must be replaced with Forney P/N F-24015 L/R or equivalent. This inspection may be discontinued when the heavier gage rib is installed. (Forney Service Bulletin No. 105 covers this subject.) This supersedes AD 47-20-07.

Affected TCDS · 2

The type certificate data sheets for the models this AD names, matched by model and maker.

TCDS A-787Univair Aircraft CorporationNames 4 of 8 models: F-1, 415-D, 415-G and 415-ETCDS A-718Univair Aircraft CorporationNames all 2 models: 415-CD and 415-C

Registered aircraft · 1,087

Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.

By aircraft maker
  • Ercoupe793
  • Engineering & Research210
  • Forney71
  • Erco12
  • Univair1
By year built
19401963

201 with no year recorded

By model

See all 19 models

Aircraft

N105VCBrewer Curtis E · Garland, TXBuilt 1946 · S/N 2534N1100BKelley Keith B · Forney, TXS/N 4983N1210HThiel Scott D · Edgewood, WABuilt 1946 · S/N 3887
See all 1,087 aircraft

NTSB investigations that cite this AD · 2

Their narratives or probable cause name AD 59-25-05, often to say whether the aircraft complied with it.

NTSB CEN09LA291Accident · No injuriesLimited investigationFinal reportUnivair Ercoupe · Brighton, MIThe pilot's failure to attain the proper touchdown point, and his failure to initiate a go-around.May 12, 2009 · N99811 · Substantial damageNTSB LAX04FA150Accident · 2 fatalField investigationFinal reportErcoupe 415-C · Oakdale, CAthe in-flight separation of the main spar due to corrosion in the wing center section not detectable by inspection methods described in manufacturer's service bulletins and FAA Airworthiness Directives.Mar 9, 2004 · N93707 · Destroyed