AD 68-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aermacchi S.p.A. | S.205 - 22/R | Airworthiness Directives; Siai-Marchetti Model S.205-22/R Airplanes |
Unsafe Condition
The suction gage instrument (Siai P/N NS5F017) lacks proper limitation markings, including a green arc from 4 to 5 inches Hg. and a red radial line at 5 inches Hg., and the suction relief valve may not maintain the required 4.5 ±0.1 inches Hg. at 2200 r.p.m., potentially allowing suction pressures exceeding 5 inches Hg. at maximum engine r.p.m.
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Required Actions
Modify the suction gage instrument by adding a green arc from 4 to 5 inches Hg. and a red radial line at 5 inches Hg., adjust the suction relief valve to achieve 4.5 ±0.1 inches Hg. at 2200 r.p.m., and ensure the suction gage does not exceed 5 inches Hg. at maximum engine r.p.m., following Siai-Marchetti Service Bulletin No. 205B21 or FAA-approved equivalent.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD unless already accomplished
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Affected Aircraft
Aermacchi S.p.A. Model S.205-22/R airplanes with serial numbers 213, 370, 371, 372, 373, 374, 378, 379, 380, 381, 382, 384, 385, 387, 388, 389, 390, 392, 393, 394, 395, 396, 398, 4-124, 4-125
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Federal Register Abstract
Suction Gage Markings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_68-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 68-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Siai-Marchetti Model S.205-22/R Airplanes Subject: Suction Gage Markings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/11/1968 Make: Aermacchi S.p.A. Model: S.205 - 22/R Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 68-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-653 AD NUMBER: 68-19-01 SUBJECT HEADING: Airworthiness Directives; Siai-Marchetti Model S.205-22/R Airplanes ACTION: SUMMARY: DATES: Effective October 11, 1968. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 68-19-01 SIAI-MARCHETTI: Amendment 39-653. Applies to Model S.205-22/R airplanes, Serial Nos. 213, 370, 371, 372, 373, 374, 378, 379, 380, 381, 382, 384, 385, 387, 388, 389, 390, 392, 393, 394, 395, 396, 398, 4-124, 4-125. Compliance required within the next 100 hours' time in service after the effective date of this AD unless already accomplished. Modify the limitation markings on the suction gage instrument, Siai P/N NS5F017, located on the right side of the instrument panel, by marking a green arc in the range from 4 inches Hg. to 5 inches Hg. and a red radial line at 5 inches Hg. and adjust the instrument's suction relief valve so that the suction gage reading is 4.5 + 0.1 inches Hg. at 2200 r.p.m., in accordance with Siai-Marchetti Service Bulletin No. 205B21 dated May 6, 1968, or later RAI-approved issue, or an FAA-approved equivalent. Check to insure that the suction gage reading does not exceed 5 inches Hg. at maximum engine r.p.m. This amendment becomes effective October 11, 1968. FOOTER:
Document Text
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AD Final Rules - DRS_68-19-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 68-19-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Siai-Marchetti Model S.205-22/R Airplanes Subject: Suction Gage Markings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/11/1968 Make: Aermacchi S.p.A. Model: S.205 - 22/R Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 68-19-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-653 AD NUMBER: 68-19-01 SUBJECT HEADING: Airworthiness Directives; Siai-Marchetti Model S.205-22/R Airplanes ACTION: SUMMARY: DATES: Effective October 11, 1968. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 68-19-01 SIAI-MARCHETTI: Amendment 39-653. Applies to Model S.205-22/R airplanes, Serial Nos. 213, 370, 371, 372, 373, 374, 378, 379, 380, 381, 382, 384, 385, 387, 388, 389, 390, 392, 393, 394, 395, 396, 398, 4-124, 4-125. Compliance required within the next 100 hours' time in service after the effective date of this AD unless already accomplished. Modify the limitation markings on the suction gage instrument, Siai P/N NS5F017, located on the right side of the instrument panel, by marking a green arc in the range from 4 inches Hg. to 5 inches Hg. and a red radial line at 5 inches Hg. and adjust the instrument's suction relief valve so that the suction gage reading is 4.5 + 0.1 inches Hg. at 2200 r.p.m., in accordance with Siai-Marchetti Service Bulletin No. 205B21 dated May 6, 1968, or later RAI-approved issue, or an FAA-approved equivalent. Check to insure that the suction gage reading does not exceed 5 inches Hg. at maximum engine r.p.m. This amendment becomes effective October 11, 1968. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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