AD 61-25-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-12 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-21 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-31 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-32 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-33 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-41 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-42 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-43 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
| aircraft | The Boeing Company | DC-8-51 | Airworthiness Directives; DOUGLAS All DC-8 Aircraft |
Unsafe Condition
Wing flap inboard actuating cylinders manufactured by Clary Corporation with specific time-in-service thresholds have failed in service due to design characteristics and corrosion, causing airplane operating difficulties.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace inboard actuating cylinders based on their time-in-service: those over 5,000 hours must be removed within 375 hours after AD effective date; those under 4,625 hours within 750 hours; and those between 4,625-5,000 hours before reaching 5,375 total hours. Inspect, modify, and reidentify replacements per Douglas Service Bulletin 27-118. Apply green paint bands or equivalent markings. Replace all flap actuating cylinders within 900 hours post-effective date, addressing corrosion and marking with two green bands.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the specified time-in-service windows after the effective date of this AD (December 9, 1961)
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC-8 aircraft with serial numbers 45252-45289, 45291-45306, 45376-45393, 45408-45413, 45416-45419, 45421-45431, 45433-45437, 45442-45445, 45526, 45565-45570, 45588-45606, 45609-45614, 45616-45622, 45624-45627, 45636.
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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