AD 70-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-33 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-41 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-42 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-43 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-51 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8 Airplanes |
Unsafe Condition
Failure of the high pressure air storage system in the auxiliary engine starting system due to corrosion or cracks in the MLG strut air storage chambers or auxiliary spherical air reservoir (P/N 7755213-1), and inadequate maintenance of the chemical air dryer cartridge and water separator leading to moisture contamination.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Deactivate the high pressure air storage system within 50 hours time in service after the effective date. Reactivate only after inspecting chambers for cracks/corrosion via SB 80-15, replacing reservoir P/N 7755213-1 if corroded, and installing a placard for compressor operation tracking. Replace dryer cartridge every 25 hours of compressor operation or 250 flight hours, check water separator every 250 flight hours, inspect air chambers for water every 1200 flight hours, and use dry air/nitrogen for recharging.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model DC-8 airplanes equipped with the high pressure air auxiliary engine starting system, including DC-8-11, -12, -21, -31, -32, -33, -41, -42, -43, -51, -62, -62F, -63, -63F models.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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