TBL 4-6-2 Contingency Actions: Weather Encounters and Aircraft System Failures that Occur After Entry into RVSM Airspace Initial Pilot Actions in Contingency Situations Initial pilot actions when unable to maintain flight level (FL) or unsure of aircraft altitude-keeping capability: Notify ATC and request assistance as detailed below. Maintain cleared flight level, to the extent possible, while evaluating the situation. Watch for conflicting traffic both visually and by reference to TCAS, if equipped. Alert nearby aircraft by illuminating exterior lights (commensurate with aircraft limitations). Severe Turbulence and/or Mountain Wave Activity (MWA) Induced Altitude Deviations of Approximately 200 feet Pilot will: Controller will: When experiencing severe turbulence and/or Vector aircraft to avoid merging target with MWA induced altitude deviations of traffic at adjacent flight levels, traffic permitting approximately 200 feet or greater, pilot will contact ATC and state "Unable RVSM Due (state Advise pilot of conflicting traffic reason)" (e.g., turbulence, mountain wave) Issue FL change or re-route, traffic permitting If not issued by the controller, request vector clear of traffic at adjacent FLs Issue PIREP to other aircraft If desired, request FL change or re-route Report location and magnitude of turbulence or MWA to ATC See paragraph 4-6-6, Guidance on Severe Turbulence and Mountain Wave Activity (MWA) for detailed guidance. Paragraph 4-6-6 explains "traffic permitting." Mountain Wave Activity (MWA) Encounters - General Pilot actions: Contact ATC and report experiencing MWA If so desired, pilot may request a FL change or re-route Controller actions: Advise pilot of conflicting traffic at adjacent FL If pilot requests, vector aircraft to avoid merging target with traffic at adjacent RVSM flight levels, traffic permitting Report location and magnitude of MWA to ATC Issue FL change or re-route, traffic permitting See paragraph 4-6-6 for guidance on MWA. Issue PIREP to other aircraft Paragraph 4-6-6 explains "traffic permitting." NOTE- MWA encounters do not necessarily result in altitude deviations on the order of 200 feet. The guidance below is intended to address less significant MWA encounters. 4-6-8 Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR