-261 PMA Col Hank Vanderborght 3f A 362w BE mz?zw . OwnH-53 Chafing Inspection • BLUF – There are indications and data that the intent of AFB 343, CABIN FUEL TUBES AND HOSES, INSPECTION OF, was not met. The risk of cabin fire was not mitigated and the hazard of chafing on fluid carrying lines and wires was not eliminated. • Recommendations: 1. Top Level leadership conduct intrusive verification that AFB 343 inspections completed with the requisite attention to detail and discrepancies found are documented and corrected in accordance with requirements of the AFB 2. ISST/NAVAIR provide immediate, specific training and demonstration to qualified inspectors on the requirements for wiring and fluid carrying line inspection, damage assessment, and correction of discrepancies 3. NAVAIR and/or TMS provide Directive(s) to amplify and issue inspection and correction of discrepancy requirements. 4. ISST provide on-site guidance to squadron/TMS lead inspectors (tiger team) to conduct thorough / detailed inspections. 2 Background • As a result of the mishap on HM-14 aircraft (Vulcan 543), AFB 343 was released DTG 072118Z FEB 14 to direct a one-time inspection of CH/MH-53E cabin fuel tubes/hoses and electrical wiring within 12 inches of fuel tubes/hoses for chafing damage • On the 15th and 21st of Jan 2015, H-53 ISST Avionics personnel performed a sample inspection at MCAS New River, MCAS Cherry Point, and FRC-E Depot to gauge the effectiveness of AFB 343 after receiving anecdotal information that the AFB did not achieve intent – Inspection consisted of personnel reviewing areas (only about 15-20 3 Assessment • 28 aircraft were sampled and ~70% had discrepancies addressed by the intent of AFB 343 • Photographs from this inspection will be posted on PMA 261 SharePoint Damage due to wire chafing 4 Number of Aircraft AFB 343 Data 0 hr: 11 1 hr: 37 2 hr: 15 Fleet Validated Hours to Complete AFB: 36 mhrs each aircraft Zip ties and spiral wrap over fuel lines (standard: not permitted to rub / chafe on fuel lines) 5 that resulted in loss of The same discrepancy Vulcan 543 Backup Zip ties and bonding strap chafing fuel line Zip ties and bonding strap chafing fuel line 7 Backup Butterfly-clamped drain lines chafing fuel line Butterfly-clamped drain lines chafing fuel line, wiring not secure 8 Backup Zip ties and harness chafing refuel line Spiral 0H fU?1 line 9 Backup Zip ties and spiral wrap chafing fuel line Wiring and splices chafing fuel vent lines 10 Fuel line Backup Butterfly-clamped drain lines chafing fuel vent line Zip ties and spiral wrap chafing fuel and drain lines 11