AD 2020-05-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson | Helicopter Company | Airworthiness Directives; Robinson Helicopter Company Helicopters |
Unsafe Condition
Failure of the pump fitting causes uncontrolled discharge of the spray liquid exiting the system pump. The pump output port is in direct alignment with the engine air intake, allowing the engine to ingest the spray liquid. This condition, if not addressed, could result in an in-flight engine shutdown.
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Required Actions
Before further flight, and thereafter before each flight, visually inspect the spray system pump fitting for signs of stress, cracking, fatigue, and evidence of leaking by following the Accomplishment Instructions, paragraphs 1. through 4., of Simplex Mfg Alert Service Bulletin ASB2017-001, Initial Release, dated March 28, 2017 (ASB2017-001). If there is any sign of stress, cracking, fatigue, or evidence of leaking, before further flight, replace spray system pump fitting P/N P-58-0752-40 with fitting P/N 000-123847-000 and install cushion clamp and hose supports. Within 3 months, unless required before further flight by paragraph (g)(1) of this AD, replace spray system pump fitting P/N P-58-0752-40 with fitting P/N 000-123847-000 and install cushion clamp and hose supports. Install a pump outlet cover.
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Compliance Time
Before further flight, and thereafter before each flight
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Affected Aircraft
Robinson Helicopter Company Model R44 and R44 II helicopters, certificated in any category, with an agricultural spray system installed by Supplemental Type Certificate (STC) SR00286BO with spray systems serial-numbered 0045 through 0178 inclusive, installed.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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