📋 What Are Service Difficulty Reports?
Airlines and repair stations are required by the FAA to report mechanical findings, part replacements, and structural inspections. These are called Service Difficulty Reports (SDRs).
More reports often means more thorough inspections — not a less safe aircraft. Airlines with rigorous programs file more SDRs. That's the system working as intended.
📊 AeroTracs Scores
Scores range from 0 to 100. A higher score means fewer and less concerning reports relative to similar aircraft.
A/A+ = Excellent ·
B/B+ = Good ·
C/C+ = Average ·
D/F = Below Average
Five factors make up the score:
- Report Frequency — How many reports vs. fleet peers
- Recent Trend — Is activity increasing or declining?
- System Spread — Are reports concentrated or distributed?
- Critical Systems — Reports on engines, flight controls, etc.
- Fleet Ranking — Position within its aircraft type
🔧 Report Statuses
✅ Resolved — Issue was found and fixed (replaced, repaired, corrected)
🔶 Deferred — Approved to continue per maintenance program (CDL/MEL) — common and safe
⚠️ Precautionary — Extra safety measures taken (rare, indicates system working properly)
✈️ Data Sources
All data comes from the FAA Service Difficulty Reporting System (SDRS) and the FAA Aircraft Registry.
441,458 FAA Service Difficulty Reports · 10,679 scored aircraft · Updated daily
AeroTracs is for informational purposes only. Not affiliated with the FAA or any airline.