Service Difficulty Report / Mechanical interruption summary
FAA Form 8070-1 (ed. 1984-11-01, electronic only) · 14 CFR 135.415 and 135.417
When you need it
135.415/135.417
What the FAA does with it
Submitted, submitted by SDRS online / FSDO.
What you'll need to provide
Defect data
What the FSDO looks for
Inspectors evaluate submissions using FAA Order 8900.1 guidance and, for certificate holders, SAS Data Collection Tools.
- 8900.1: V3 C32 S14 Review the Operator’s Mechanical Interruption Summary for 14 (CHG 239, Current) | V3 C32 S15 Review/Accept a 14 CFR Part 121, 125, or 135 Service Difficu (CHG 896, Current)
- Advisory Circulars: None listed
- DCTs: ED_4.4.2_A_AW_V13.0; ED_4.4.2_B_AW_V18.0; ED_4.4.2_C_AW_V18.0; ED_4.4.2_E_AW_V18.0; EP_4.4.2_A_AW_V14.0; EP_4.4.2_B_AW_V20.0; EP_4.4.2_C_AW_V20.0; EP_4.4.2_D_AW_V20.0; EP_4.4.2_E_AW_V20.0
Common reasons submissions are returned
- Aircraft data (make, model, serial, N-number) inconsistent across the application, the document and the registration certificate
- Outdated revision of a referenced AC, MMEL or template
- Missing signatures, dates or revision control on each page
- Missing required attachments: Defect data
- Submitting to the wrong office or by the wrong method (expected: SDRS online / FSDO)
General issues drawn from the requirements above, not statistics.
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Sources: the regulations, ACs and 8900.1 sections listed above (public FAA documents). Guides explain requirements; they are not the document and not legal advice.
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