Trial of Continuous Once Daily Oral Treatment Using BIBW 2992 (Afatinib) Plus Sirolimus (Rapamune®) in Patients With Non-small Cell Lung Cancer Harbouring an EGFR Mutation and/or Disease Progression Following Prior Erlotinib or Gefitinib

Inclusion criteria:

1. Pathologically or cytologically confirmed diagnosis of Stage IIIB or Stage IV NSCLC
2. Patients who have failed conventional treatment (at least 1 prior treatment line), or for whom no therapy of proven efficacy exists
3. Patients whose tumors:

   * are EGFR mutation-positive or
   * are EGFR mutation-negative or unknown provided they had disease progression after achieving either response or stable disease for at least 6 months from a previous treatment with erlotinib (Tarceva®) or gefitinib (Iressa®)
4. Patients aged 18 years or older
5. Life expectancy of at least three (3) months
6. Eastern Cooperative Oncology Group (ECOG, R01-0787) performance score 0-2
7. Written informed consent that is consistent with ICH-GCP guidelines

Exclusion criteria:

1. Prior major surgery, chemotherapy or radiation therapy within 4 weeks before start of therapy.
2. Prior treatment with an mTOR inhibitor within the past 4 weeks before start of therapy or concomitantly with this study
3. Use of erlotinib (Tarceva®) or gefitinib (Iressa®) within 14 days of run-in treatment with Sirolimus
4. Active CNS metastases (defined as stable for \<4 weeks and/or symptomatic and/or requiring treatment with anticonvulsants or steroids)
5. Severe alteration in serum fasting cholesterol (equal or more than 350 mg/dL) or triglycerides (equal or more than 400 mg/dL). Patients may be allowed to enrol on the trial after initiation of lipid lowering agents.
6. Requirement for treatment with any of the prohibited concomitant medications:

   * Concomitant CYP3A4 inhibitors within the past 7 days before start of therapy or concomitantly with this study.
   * Concomitant CYP3A4 inducers within the past 14 days before start of therapy or concomitantly with this study.
7. Any contraindications for therapy with Sirolimus.
8. Known hypersensitivity to BIBW 2992, Sirolimus or other rapamycin analogues (everolimus, temsirolimus, deforolimus, etc.) or the excipients of any of the trial drugs.
9. Use of any investigational drug within 4 weeks before start of therapy.