75 service difficulty reports for the Airbus A340 (all variants) across 21 systems (1997–2011).
Reported systems
| System | ATA | Reports | Share |
|---|---|---|---|
| Engine - Turbine/Turboprop | ATA 72 | 12 | 16% |
| Flight Controls | ATA 27 | 10 | 13.3% |
| Landing Gear | ATA 32 | 8 | 10.7% |
| Fuselage | ATA 53 | 5 | 6.7% |
| Equipment & Furnishings | ATA 25 | 4 | 5.3% |
| Engine Fuel & Control | ATA 73 | 4 | 5.3% |
| Doors | ATA 52 | 4 | 5.3% |
| Navigation | ATA 34 | 4 | 5.3% |
| Fire Protection | ATA 26 | 3 | 4% |
| Air Conditioning | ATA 21 | 3 | 4% |
| Hydraulic Power | ATA 29 | 3 | 4% |
| Engine Exhaust | ATA 78 | 3 | 4% |
| Communications | ATA 23 | 2 | 2.7% |
| Auxiliary Power Unit (APU) | ATA 49 | 2 | 2.7% |
| Oxygen | ATA 35 | 2 | 2.7% |
| Auto Flight | ATA 22 | 1 | 1.3% |
| Engine Controls | ATA 76 | 1 | 1.3% |
| Nacelles & Pylons | ATA 54 | 1 | 1.3% |
| Electrical Power | ATA 24 | 1 | 1.3% |
| Lights | ATA 33 | 1 | 1.3% |
| Engine Oil | ATA 79 | 1 | 1.3% |
Report counts reflect fleet size and reporting activity, not relative safety or reliability. Source: FAA Service Difficulty Reporting System (public domain).