The concern sheetOCR
This is OCR from the scanned FAA concern sheet. OCR can misread letters and numbers.
Airworthiness FAA Concern Sheet Date:2/27/08 Full Name: Robert A. Romero Title: Aerospace Engineer Organization: ASW-150 Department:
Address: 2601 Meacham Blvd City: Fort Worth State: TX Zip: 76133 Telephone/Fax Number: 817-222-5102/5960 E-Mail: Robert.A.Romero@faa.gov Make, Model, Series, Serial No.:
AT-300 and AT-400 Series airplanes with aluminum spar caps Reason for Airworthiness Concern:
Revise current AD to add requirement to repetitively inspect prior to modification/replacement.
FAA Description of Airworthiness Concern (Who, What, Where, When, How? Attachments: RA and appropriate data) and Request for Information (Proposed Alternate Inspection/Repair Procedures, Cost Impact, Etc. Note: Any comments or replies to the FAA need to be as specific as possible. Please provide specific examples to illustrate your comments/concerns.):
The FAA intends to revise AD 2003-06-01- to add repetitive inspection requirements for the AT-300/AT-400 Series airplanes with aluminum spar caps. Based on a recent report of an AT-301 that had cracks discovered at hours below the modification time listed in AD 2003-06-01, the FAA has re-evaluated its fatigue management plan for the AT-300/400 series airplanes with aluminum spar caps. All airplanes with aluminum spar caps, except those with part number 20990-2 installed, will be required to repetitively inspect their lower spar caps beginning at 3,500 hours TIS.
Risk Assessment
a. Safety Effect: 4
b. Operational Use: 1 Safety Risk Factor = a x b x c + d + e + f + g
c. Percentage use by Population: 1 = 4x1x1+3+2+2-2
d. Number of Occurrences: 3 = 9
e. Events vs. Population: 2
f. Time between Events: 2 Urgent Safety of Flight AD
g. Aircraft Type: -2 Potential Immediate Adopted AD Attachments: *SDR(s) • *A/IDSL *SL(s) • *SAIBO *FAASR/NTSBSR • *ADD *AOCU *RAL Notification: FAA • *AOPA *EAA - Type Club *TC Holder Other: NAAA Response Requested 12/20/04: Emergency (10 days) Alert (30 days) Information (90 days) L (Word 97 Version: Manually Check Appropriate Boxes) *Service Difficulty Reports (SDRs); Accident/Incident Data System (A/IDS); Service Letter (SL); Special Airworthiness Information Bulletin (SAIB);
Federal Aviation Administration (FAA)/National Transportation Safety Board (NTSB) Safety Recommendation (FAASR/NTSBSR); Airworthiness Directive (AD); Alternate Method of Compliance (AMOC); Risk Assessment (RA); Aircraft Owners & Pilots Association (AOPA);
Experimental Aircraft Association (BAA); Type Certificate (TC)