The concern sheet
Text extracted from the PDF.
Revised 1/24/02 Airworthiness Concern Sheet
Date: March 10, 2008 Full Name : Donald Ristow Title: Aerospace Engineer Organization: Wichita ACO, ACE-116W Department: Mechanical Systems Address : 1801 Airport Road, Room 100 City State ZIP: Wichita, Kansas, 67209 Telephone No: 316-946-4120 E-mail:Donald.Ristow@FAA.GOV Make, Model, Series, Serial No.:
Hawker Beechcraft Corporation (HBC) Model B200, serials BB-1926, BB-1978, BB-1988 thru BB-2000 Model B200GT, serials BY-1 thru BY-26 Model B300, serials FL-427, FL-493, and FL-500 thru FL-573 Model B300C, serials FM-14 thru FM-18 Reason for Airworthiness Concern: Flight into icing conditions without the proper functioning of the horizontal stabilizer deice system could lead to the inability to shed ice accumulations and subsequently result in the loss of control of the airplane.
FAA Description of Airworthiness Concern:
HBC has received three reports of collapsed pneumatic tubes that supply both pressure and vacuum to the horizontal stabilizer de-ice boots. With the introduction of an improved environmental control system in the aft evaporator bay, a section of the pneumatic deice tube located in this area is subject to higher than normal temperature, causing the tube to collapse and permanently block flow to and from the deice boots. This condition could go undetected.
HBC has issued a safety communiqué (No. 290) to notify owners and operators of this condition and to recommend flight crews avoid flight into icing conditions. A service bulletin is currently in work that introduces a kit to replace the tube with one that has a higher temperature capability. In the interim, the FAA proposes to placard the affected aircraft to prohibit flight into known icing until such time as the HBC service bulletin is accomplished.
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.): Because the FAA is considering airworthiness action to limit operation and mandate the HBC service bulletin on these airplanes, we are soliciting additional information or comments. Please send your comments to the above e-mail address.
Attachments: *SDR(s) *A/IDS *SL(s) *SAIB *FAASR/*NTSBSR *AD *AMOC *RA
Notification: FAA *AOPA *EAA Type Club *TC Holder Other: GAMA
Response Requested 03/20/08: Emergency (10 days) Alert (30 days) Information (90 days)
*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 (EAA); Type Certificate (TC) This Airworthiness Concern Sheet (ACS) is intended as a means for FAA Aviation Safety Engineers to coordinate airworthiness concerns with aircraft owner/operators through associations and type clubs. At this time, the FAA has not made a determination on what type of corrective action (if any) should be taken. The resolution of this airworthiness concern could involve an AD action or an SAIB, or the FAA could determine that no action is needed at this time. The FAA’s final determination will depend in part on the information received in response to this ACS. The FAA endorses dissemination of this technical information to all manufacturers and requests association and type clubs comments.